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Radiological
procedure of GI
Tract -01
Presentor
Miss Kajal Jha
BSC MIT(2016 BATCH)
Moderator
Mr Ranjit Kr Jha
Assistant Professor,
BPKIHS Dharan
Sagital plane
Transumbilical
plane
Sub costal
plane
Intertubercular
plane
Mid clavicular
plane
WHERE ARE YOU???
Liver, gall bladder Stomach,spleen,left
colic flexure
Stomach,
duodenu
m,pancre
ase
Aorta,IV,
Coils of
SI,Stoma
ch
Rt kidney and
ureter and
decending
colon
Caecum,vermi
form
appendix
Urinary
bladde
r,coils
of
SI,enla
rged
Lt kidney and ureter ,
decending colon
Sigmoid
colon
What is Gastrointestinal(GI)
tract?
Gastrointestinal
= stomach and intestines.
Tract
=a collection of related
anatomic structures or a
series of connected body
organs.
 The complete human digestive system is made up of the
gastrointestinal tract (esophagus, stomach, and
intestines) and the accessory organs of digestion
(the tongue, salivary glands, pancreas, liver and
gallbladder).
 The tract is divided as
 Upper GI tract and
 Lower GI tract
On embryologic grounds, the GI tract should be divided
into-
 upper (mouth to major papilla in the duodenum),
 middle (duodenal papilla to mid-transverse colon),
and
 lower (mid-transverse colon to anus)
according to the derivation of these 3 areas from the
foregut, midgut, and hindgut, respectively.
What types of tests are used to
examine the gastrointestinal tract?
1. Fluoroscopy
2. Upper GI test
1. Types of Upper GI Tests
1. Barium swallow (esophagography)
2. Upper GI series
3. Small bowel series
3. Lower GI test
1. Types of Lower GI Tests
1. Air contrast barium enema (also called double contrast
barium enema)
2. Barium enema
4. Ultrasound
 Transcutaneous
 Endosonography
5. CT
6. MRI
7. Angiography
8. Radionuclide imaging
 Inflammatory bowel disease
 Gastro-oesophagel reflux
 Gastric emptying
 Bile reflux study
 Meckel’s scan(A Meckel's scan is an imaging test used to detect a Meckel's
diverticulum. This is a small, abnormal pocket that forms in the wall of your child's small
intestine)
 Gastrointestinal bleeding
Fluoroscopy
 Fluoroscopy is a type of X-ray that allows part
of the body to be studied in motion and
recorded on a video monitor.
 This type of X-ray is used to examine the
gastrointestinal (GI) tract (esophagus,
stomach, small intestine, large intestine
(colon) and rectum) so that your physician
can detect abnormalities in the size, shape,
position or functioning of these organs.
Upper GI test
 the patient drinks a contrast solution that
contains barium.
 The barium solution is sweetened and
flavored, but does taste chalky.
 As the barium passes through the digestive
tract, it provides an outline of the swallowing
process as well as the esophagus, stomach
and part of the small intestine.
 This test is used to diagnose –
 hiatal hernias (Hiatal hernia is a condition in which the upper portion of the stomach
protrudes into the chest cavity through an opening of the diaphragm called the esophageal hiatus.
This opening usually is only large enough to accommodate the esophagus)
 ulcers, tumors,
 Diverticulitis (medical condition that causes inflamed pouches in the lining of your intestine)
 esophageal varices (Esophageal varices are enlarged veins in the esophagus.
They're often due to obstructed blood flow through the portal vein, which carries blood from the
intestine, pancreas and spleen to the liver),
 obstruction, narrowing, or enteritis (inflammation of the small
intestine lining).
 It may also be used to determine the causes
of swallowing problems, reflux, abdominal
pain, diarrhea, unexplained vomiting or
weight loss or bleeding
Contrast materials
 used to improve pictures of the inside of the
body produced by x-rays, computed
tomography (CT), magnetic resonance (MR)
imaging, and ultrasound
 allow the radiologist to distinguish normal
from abnormal conditions.
 are not dyes that permanently discolor
internal organs.
 are substances that temporarily change the
way x-rays or other imaging tools interact
with the body
 help distinguish or "contrast" selected areas
of the body from surrounding tissue. By
improving the visibility of specific organs,
blood vessels or tissues, contrast materials
help physicians diagnose medical conditions.
 Barium-sulfate is the most common contrast
material taken by mouth, or orally.
 It is also used rectally and is available in
several forms, including:
 powder, which is mixed with water before
administration
 liquid
 paste
 tablet
 used to enhance x-ray and CT images of the
gastrointestinal (GI) tract, including:
 pharynx
 esophagus
 stomach
 the small intestine
 the large intestine (colon)
How safe are contrast
materials?
 Contrast materials are safe drugs; adverse
reactions ranging from mild to severe do
occur but severe reactions are very
uncommon.
 While serious allergic or other reactions to
contrast materials are rare, radiology
departments are well-equipped to deal with
them.
Side effects and adverse and
allergic reactions
 tell your doctor if these mild side effects of
barium-sulfate contrast materials become
severe or do not go away
 stomach
 cramps
 diarrhea
 nausea
 vomiting
 constipation
 Tell your doctor immediately about any of
these symptoms:
 hives
 itching
 red skin
 swelling of the throat
 difficulty breathing or swallowing
 hoarseness
 agitation
 Confusion
 fast heartbeat
 bluish skin color
You are at greater risk of an adverse reaction
to barium-sulfate contrast materials if:
 you have a history of asthma, hay fever, or other
allergies, which will increase your risk of an allergic
reaction to the additives in the barium-sulfate agent.
 you have cystic fibrosis, which will increase the risk of
blockage in the small bowel.
 you are severely dehydrated, which may cause severe
constipation.
 you have an intestinal blockage or perforation that could
made worse by a barium-sulfate agent
BARIUM
 Barium suspension is made up of barium
sulphate.
 (barium carbonate is poisonous)
 BaSO4 is an ionic salt of barium (Ba), a
metallic chemical element with atomic
number 56.
 Unlike barium and many of its other salts,
barium sulfate is insoluble in water and
therefore very little of the toxic barium metal
is absorbed into the body.
Indications
It is the preferential contrast agent for
gastrointestinal (GI) examinations due to:
 high attenuation of x-rays
 lack of absorption from the gut into the body
 lack of toxicity (in the gut)
Contraindications
 known or strongly suspected gastrointestinal perforation
 may be used in evaluation for possible esophageal
perforations
 large volume aspiration risk
 prior allergic reaction (rare)
 left-sided colonic obstruction (relative contraindication)
 if the barium cannot exit the colon, it has the potential
to become inspissated and very hard, leading to a
quite problematic constipation
Complications
 may cause a peritonitis if they leak into the
peritoneal space.
 Barium migration into the bloodstream,
known as intravasation is a serious and rare
complication
 recent research suggests that these concerns
are unfounded and no case reports of
clinically-significant barium-induced
pleural/mediastinal inflammation exist.
Ba as Contrast agent
 A non ionic suspension is used(for otherwise
the barium particles would aggregate into
clumps)
 Ba particle size must be small(0.1-3
micrometer)
 The resultant solution has the PH of 5.3
which makes it stable in gastric acid.
Barium Studies For GI Tract
s/no Type of study Proprietary
name
Density(W/V) Volume
(ml)
Parts to be examined
1 Barium
swallow
E-Z HD 250% 100 Oesophagus
2 Barium Meal E-Z HD 250% 135 Stomach
3 Barium follow
through
E-Z Paque 60-100% 300 Small bowel
4 Small bowel
enema
E-Z Paque 60% 1500 Small bowel
5 Barium enema Polibar 115% 500 Rectum,sigmoid
colon,decening,transve
rse and acending
colon,caecum
Doses and concentration of
Barium Sulphate used
S/NO STUDY TYPE CONCENTRATION
(W/V)
APPROX.QUA
NTITY (ml)
1 Barium Swallow Single contrast 100% varriable
Double contrast
250%
varriable
2 Upper GIT study Single contrast 82-100% 300-350
Double contrast 200-250% 200
50% 500-600
3 Ba MFT
Enteroclysis
Single contrast 20% 800-1200
Double contrast 85% 200
4 Barium enema Single contrast 15-20% Varriable
Double contrast 60-110% varriable
5 CT Abdomen 1-5% 800-1000
Choice of contrast media
 Non ionic contrast media are the prefered
agents in almost all contrast rdiographic
studies:
 Low osmolarity
 Higher radiographic density
 Lower incidence of idiosyncreatic and nin
iodiosyncreatic reactions
 The only limiting factor in their widepread use
is their cost.
 The current trend is to weight the cost benefit
of use of various contrast media.
s/no study indication Agent used Comments
1 IVP Routine Ionic water soluble
contrast
Low cost
Congestive heart
failure in eldery
children
Non ionic water
soluble contrast
agents
Low osmolarity,
therefore less
hemodynamic impact.
Less water loss
through kidney
Atropy,asthama,p
revious drug or
contrast reaction
Non ionic water
soluble
Low incednce of
idiosyncrar=tic
reaction as compared
to ionic contrast agent
2 GIT
STUDIES
Routine single
contrast
95% w/v BaSo4
suspension
Routine double
contrast
250% w/v BaSo4
suspension
s/no study indication Agent used Comments
2
(contd)
Ba
Swallow
H/O aspiration in
child Non ionic
water
soluble
contrast
Because of its high osmolarity
ionic contrast agents draw
water into alveoli if aspirated,
causing sever pulmonary
odema. Therefore ionic
contrast agents are totally
contraindicated in these
conditions,and non ionic
agents are used
Suspected tracheo-
oesophageal fistula
Oesophageal
perforation
Ionic or non
ionic
contrast
agents
Leakage of BaSo4 into
mediastinum can lead to
mediastinal fibrosis
3 Ba Meal
or Ba
Enema
Routine BaSo4
suspension
•Abdominal trauma
•Perforation
peritonitis
•Post operative
Water
soluble
contrast
agent
Ionic or non ionic agents may
be used as BaSo4
suspension. Leakage can
cause peritoneal adhesion and
uretric or bowel obstruction
s/no study indication Agent used Comments
3 Ba Meal or Ba
Enema
Pre operative Water soluble
contrast agent
Study with BaSo4
suspension will
preclude any abdominal
surgery for 7 days
Meconium ileus Ionic contrast
agent
Because of their high
osmolarity these agents
draw water into bowel
lumens and can soften
the meconium and
relive obstruction.
s/no study indication Agent
used
Comments
4 Follow
through
examination
Suspected
large bowel
obstruction
Water
soluble
contrast
BaSo4 suspension can cause
impaction because of water
resorption in colon. Ideally in these
conditions a barium enema or
colonscopic examination must be
done. If, however , an oral follow
through contrast examination is
indicated a water soluble contrast
agent should be used.
5 angiography Cerebral
angiograph
y routine
Non ionic
contrast
media
•Non ionic contrast media are more
comfortable in a conscious patient
as they cause less vasodialation
•Na+ containing ionic contrast
agents are toxic to vascular
endothelium and may cause
disruption of BBB and cerebral
odema. So if ionic contrast are used
meglumine salts are prefered over
Na+.
s/no study indication Agent
used
Comments
5 angiogr
aphy
Renal
arteriography
Non ionic
contrast
media
Ionic contrast media can causse renal
tubular damage and therefore best
avoided for this application.
Coronary
arteriography
Nonionic
contrast
media
•They have safe hemodynamics and
myocardial profile.
•Experimental research suggests that
addition of Na + to these agents reduce
the risk of arrhythmias associated with
the procedures.
Ionic
contrast
agents
•If use, these agents should have
physiological level of Na+ which reduces
the risk of arrhythmias.
•Pure solutions of both meglumine and
Na+salts is cardiotoxic, therefore a
combination of the two should be used.
•Should have Ca++ binding property,
therefore Ca++ EDTA is used as a
stablising agent instead of Na+EDTA.
s/no study indication Agent used Comments
5 angiography Peripheral
arteriography
routine
Non ionic
contrast
agent
Prefered as they cause less pain,
warmth and discomfort and obviate
the need of general anethesia.
Ionic dimer
agent(Hexa
brix)
Second best to non ionic contrast
agents, but have toxicity for vascular
endothelium because of Na+
content.
If used, meglumine containing salts
are prefered as Na + containing
salts are toxic to vascular
endothelium and cause more pain
Ionic
monomers
Angiography
with
angioplasty
Ioxaglate(H
exabrix):
It is preferred agent for angiography
because of its antip;atelet and
antithrombotic action.
Ionic dimer Bacause of its Na+ content, it
maintains physiological level of Na+
and therefore preferred in coronary
interventions.
s/no study indication Agent
used
Comments
5 Angiograph
y
Peripheral
angiography
in patient with
previous
sever
contrast
reaction
CO2 CO2 has been used as a negative
contrst for peripheral angiography using
digital substraction unit with varriable
results.
Renal or
peripheral
angiography
ina a patient
with renal
failure
Gadolini
um
chelates
Radiodensity of Gd is less than iodine
and their cost is high. But theoritically
Gd chelated can be used in patients
with renal failures, because of their safe
profile in such patients.
6 CT Routine
abdominal
scanning
Iodinate
d
contrast
agent 2-
5 % w/v
Poor taste and acceptance by the
patiens.
Because of osmotic movement of water
across the bowel mucosa, there is
dilution of contrast at the interphase of
mucosa and bowel lumen. Therefore
mucosal delineation is less clear
compared to BaSO4 suspension.
s/no study indication Agent used Comments
6 CT
Routine
abdominal
scanning
BaSO4 suspension 1-
3%
Gives better delineation
of mucosa than
iodinated water soluble
agents.
water Gives excellent bowel
wall details when used
with intravascular
contrast enhancement
in high resolution fast
scanning syatem
Pharynx and oesophagus
 Pharynx, (Greek: “throat”) cone-shaped
passageway leading from the oral and nasal
cavities in the head to
the esophagus and larynx.
 The pharynx chamber serves both
respiratory and digestive functions.
 Extends from base of the skull to the T6.
 The anterior portion is the nasal pharynx, the
back section of the nasal cavity.
 The nasal pharynx connects to the second
region, the oral pharynx, by means of a
passage called an isthmus.
 The oral pharynx begins at the back of
the mouth cavity and continues down the throat to the
epiglottis, a flap of tissue that covers the air passage
to the lungs and that channels food to the esophagus
 The third region is the laryngeal pharynx,
which begins at the epiglottis and leads down
to the esophagus.
 Its function is to regulate the passage of air to the
lungs and food to the esophagus.
 The oesophagus is a fibromuscular tube,
approximately 25cm in length, that transports food
from the pharynx to the stomach.
 It originates at the inferior border of the cricoid
cartilage (C6) and extends to the cardiac orifice of
the stomach (T11).
 The oesophagus passed via a hole in the
diapgragm called oesophageal hiatus which is
situated at the level of the 10th thoracic vetebra
 Oesophageal Sphincters
 There are two sphincters present in the
oesophagus, known as the upper and lower
oesophageal sphincters.
 They act to prevent the entry of air and the
reflux of gastric contents respectively.
 Upper Oesophageal Sphincter
 The upper sphincter is an anatomical, striated muscle
sphincter at the junction between the pharynx and
oesophagus.
 Normally, it is constricted to prevent the entrance of air into
the oesophagus.
 Lower Oesophageal Sphincter
 The lower oesophageal sphincter is a physiological
sphincter located in the gastro-oesophageal
junction (junction between the stomach and
oesophagus)..
Recommended imging
procedures
 Ba examination/endoscopy (most common)
 Radionuclide imaging(to acess gastro-
oesophageal reflux)
 Ct and MRI (to determine the extent of
oesophageal carcinoma and for radiotherapy
planning)
Barium swallow
Normal Ba Swallow
Barium swallow showing
esophageal dilatation and
beaking
Ba swallow showing
cervical stricture
 Indication
 Dysphagia (most common)
 Carcinoma of oesophagus
 Oesophageal strictures, varices and ulceration
 Hiatus hernia
 Oesophageal reflux
 Anaemia
 Pain
 Assessment of tracheo-oesophageal fistulae
 Assessment of site of perforation
Contraindication
 Oesophageal perforation esulting in leakage
into mediastinal,pleural or periotenal cavities
 In such case it is normal to commene the
examination using a water based ionic contrast
agent.
Preliminary film
 A control film is advised prior to a water
soluble study if perforation is suspected.
Imaging technique
 The patient is in the erect, right anterior
oblique (RAO) position to throw the
oesophagus clear of the spine.
 An ample mouthful of barium is swallowed,
and spot films of the upper and lower
oesophagus are taken.
 Oesophageal varices are better seen in the
prone, right posterior oblique (RPO) position,
as they will be more distended.
 the patient is turned prone and placed in
the right anterior oblique position with a
bolster under the rib cage.
 The patient is observed drining barium via
straw to demonstrate the presense of hiatus
hernia.
 A hiatal hernia is when your stomach bulges up into your
chest through an opening in your diaphragm, the muscle
that separates the two areas. The opening is called
the hiatus, so this condition is also called a hiatus hernia.
Complications
1. Leakage of barium from an unsuspected
perforation
2. Aspiration.
Stomach and small bowel
 the stomach lies between the oesophagus
and the duodenum (the first part of the small
intestine). It is in the left upper part of
the abdominal cavity.
 The four main sections of the stomach are
the cardia, fundus, body, and pyloric part.
 The small intestine (small bowel) lies
between the stomach and the large intestine
(large bowel) and includes the duodenum,
jejunum, and ileum.
 The small intestine is so called because its lumen
diameter is smaller than that of the large intestine,
although it is longer in length than the large
intestine.
 The duodenum continues into the jejunum at
the duodenojejunal junction or flexure, which
lies to the left of L2 vertebra and is fixed to
the retroperitoneum by a suspensory
ligament of Treitz.
 The inferior mesenteric vein (IMV) lies to the
left of the duodenojejunal junction.
 From proximal (at the stomach) to distal,
these are the duodenum, jejunum, and ileum
 The shortest region is the 25.4-cm (10-
in) duodenum, which begins at the pyloric
sphincter.
 subdivided into four segments: the superior,
descending, horizontal, and ascending
duodenum.
 The jejunum is about 0.9 meters (3 feet)
long (in life) and runs from the duodenum to
the ileum.
 The ileum is the longest part of the small
intestine, measuring about 1.8 meters (6 feet)
in length.
Recommended studies
 Barium meal (to investigate the stomach and the proximal
portion of the small bowel.
 Hypotonic duodenography can provide
additional information where lesions of the
duodenogram are suspected including
lesions of the head of pancrease.
 Small bowel enema and barium follow
through( to examine the small bowel in its entirety)
 Fibreoptic endoscopy (examination of the upper GI Tract and
used particularly in the assessment of the gastric wall and assiociated
viscera)
 Radionuclied imaging(assess the rate of gastric
emptying.also in Mickel’s diverticulum and inflammatory bowel
disease)
 CT (to investigate mass lesion of assiociated structures such as
pancrease.)
 USG (can be used in the case of pyloric stenosis to measure the
antral wall thickness but isnot the modality of choice.)
BARIUM MEAL
 Methods
1. Double contrast – the method of choice to
demonstrate mucosal pattern.
2. Single contrast – uses:
 a. children – since it usually is not necessary
to demonstrate mucosal pattern
 b. to demonstrate gross pathology only
Indications
 1. Failed upper gastrointestinal endosocpy
 2. Dyspepsia
 3. Weight loss
 4. Upper abdominal mass
 5. Gastrointestinal haemorrhage (or unexplained iron-deficiency
 anaemia)
 6. Partial obstruction
 7. Assessment of site of perforation – it is essential that a
watersoluble
 contrast medium, e.g. Gastrografin or LOCM, is used.
Contraindications
 Complete large-bowel obstruction
Patient preparation
 1. Nil orally for 6 h prior to the examination
 2. It should be ensured that there are no
contraindications to the
 pharmacological agents used.
 Preliminary film
 None.
 The double contrast method:
 1. A gas-producing agent is swallowed.
 2. The patient then drinks the barium while
lying on the left side,supported by the elbow.
 This position prevents the bariumfrom reaching
the duodenum too quickly and so obscuring the
greater curve of the stomach.
Technique
 3. The patient then lies supine and slightly on
the right side, to bring the barium up against
the gastro-oesophageal junction.
 This manoeuvre is screened to check for reflux,
which may be revealed by asking the patient to
cough or to swallow water while in this position.
 The significance of reflux produced by tipping the
patient’s head down is debatable, as this is an
unphysiological position.
 If reflux is observed, spot films are taken to record
the level to which it ascends.
 4. An i.v. injection of a smooth muscle
relaxant (Buscopan 20mg or glucagon 0.3mg) is given.
 The administration of Buscopan has been shown not
to affect the detection of gastrooesophageal reflux or
hiatus hernia.
 5. The patient is asked to roll onto the right
side and then quickly over in a complete
circle, to finish in an RAO position.
 This roll is performed to coat the gastric mucosa
with barium. Goodcoating has been achieved if
the areae gastricae in the antrum are visible.
 From the left lateral position the patient
returns to a supine position and then rolls
onto the left side and over into a prone
position.
 This sequence ofmovements is required to
avoid barium flooding into the duodenal loop,
which would occur if the patient were to roll
onto the right side to achieve a prone
position.
 2. Spot film of the duodenal loop (lying):
 a. Prone – the patient lies on a compression
pad to prevent barium from flooding into the
duodenum.
 An additional view to demonstrate the
anterior wall of the duodenal loop may be
taken in an RAO position
 3. Spot films of the duodenal cap (lying):
 a. Prone
 b. RAO – the patient attains this position from
the prone position by rolling first onto the left
side, for the reasons mentioned above
 c. Supine
 d. LAO.
 4. Additional views of the fundus in an erect
position may be taken at this stage, if there is
suspicion of a fundal lesion.
 5. Spot films of the oesophagus are taken,
while barium is being swallowed, to complete
the examination
Aftercare
 1. The patient should be warned that his
bowel motions will be white for a few days
after the examination and may be difficult to
flush away.
 2. The patient should be advised to eat and
drink normally to avoid barium impaction.
Laxatives may be taken if required.
 3. The patient must not leave the department
until any blurring of vision produced by the
Buscopan has resolved.
Complications
 1. Leakage of barium from an unsuspected
perforation
 2. Aspiration of stomach contents due to the
Buscopan
 3. Conversion of a partial large bowel
obstruction into a complete obstruction by the
impaction of barium
 4. Barium appendicitis, if barium impacts in
the appendix (exceedingly rare)
 5. Side-effects of the pharmacological agents
used.
BARIUM FOLLOW-THROUGH
 Methods
 1. Single contrast
 2. With the addition of an effervescent agent
 3. With the addition of a pneumocolon technique.
 Indications
 1. Pain
 2. Diarrhoea
 3. Anaemia/gastrointestinal bleeding
 4. Partial obstruction
 5. Malabsorption
 6. Abdominal mass.
 Contraindications
 1. Complete obstruction.
 2. Suspected perforation (unless a water-soluble
contrast medium is used).
 Patient preparation
 Metoclopramide 20mg orally may be given before
or during the examination.
 Preliminary film
 Plain abdominal film is used if small bowel
obstruction is thought possible.
Technique
 The aim is to deliver a single column of
barium into the small bowel.
 This is achieved by laying the patient on his right
side afterthe barium has been ingested.
 Metoclopramide enhances the rate of gastric
emptying. If the transit time through the small
bowel is found to be slow, the addition of an
osmotic water-soluble contrast agent may help to
speed it up.
 If a follow-through examination is combined
with a barium meal, glucagon is used for the
duodenal cap views rather than Buscopan
because it has a short length of action and
does not interfere with the small-bowel transit
time.
 Films
 1. Prone PA films of the abdomen are taken every
15–20 min during the first hour, and subsequently
every 20–30 min until the colon is reached.
 The prone position is used because the pressure on
the abdomen helps to separate the loops of small
bowel.
 2. Spot films of the terminal ileum are taken
supine, using a compression pad.
 Additional films
 1. To separate loops of small bowel:
 a. compression with fluoroscopy
 b. obliques
 c. with X-ray tube angled into the pelvis
 d. with the patient tilted head down.
 2. To demonstrate diverticula: erect film – this
position will reveal any fluid levels caused by
contrast medium retained within the diverticula.
 Barium meal follow-through in the 70-year-old
patien
Lets ponder!!!
1. Preliminary film in any examination is taken
for:
I. To make adjustments in exposure factors
II. To check patient position
III. To demonstrate, identify and localise opacities
IV. All of above
II. Indication for water soluble contrast media
is:
a) Suspected perforation
b) Ileocaecal TB
c) Constipation
d) Gastroesophageal reflux disease
3) Buscopan is contraindicated in all except:
1. Myasthenia gravis
2. Paralytic ileus
3. Pyloric stenosis
4. Open angel glaucoma
 Water insoluble contrast media is used in all
except:
1. Barium meal folloe through
2. Barium swallow
3. Sinogram
4. Barium eneme
 The method of choice to demonstrate
mucosal pattern in Ba studies is:
1. Single contrast
2. Non contrast
3. Double contrast
4. intravenous
 In Ba meal sequence antrum and body of
stomach are visualised in the position:
1. Supine
2. Left ant obq
3. Right post obq
4. Left lateral
Reference
 A guide to radiological procedures.
 Research gates
 Radiopedia
 Clark’s Special procedure in diagnostic imaging.
 Satish Bhargabhawa
 Radiology refrense articles
 BD Chaurasya anatomy book
 NCBI book Self
 MCQs in Radiology for Residents and Technologists-
Sumeet Bhargava and Satish K Bhargava
AIR AND FEELINGS ARE NOT ONLY THE
POWERFUL THINGS YET INVISIBLE. WE
HAVE SOMETHING MORE TO IT. NAME IT
X-RAY.
-Kajal Jha
Radiological procedure of GI Tract  01

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Radiological procedure of GI Tract 01

  • 1. Radiological procedure of GI Tract -01 Presentor Miss Kajal Jha BSC MIT(2016 BATCH) Moderator Mr Ranjit Kr Jha Assistant Professor, BPKIHS Dharan
  • 3.
  • 4. WHERE ARE YOU??? Liver, gall bladder Stomach,spleen,left colic flexure Stomach, duodenu m,pancre ase Aorta,IV, Coils of SI,Stoma ch Rt kidney and ureter and decending colon Caecum,vermi form appendix Urinary bladde r,coils of SI,enla rged Lt kidney and ureter , decending colon Sigmoid colon
  • 5. What is Gastrointestinal(GI) tract? Gastrointestinal = stomach and intestines. Tract =a collection of related anatomic structures or a series of connected body organs.
  • 6.  The complete human digestive system is made up of the gastrointestinal tract (esophagus, stomach, and intestines) and the accessory organs of digestion (the tongue, salivary glands, pancreas, liver and gallbladder).  The tract is divided as  Upper GI tract and  Lower GI tract
  • 7. On embryologic grounds, the GI tract should be divided into-  upper (mouth to major papilla in the duodenum),  middle (duodenal papilla to mid-transverse colon), and  lower (mid-transverse colon to anus) according to the derivation of these 3 areas from the foregut, midgut, and hindgut, respectively.
  • 8.
  • 9.
  • 10.
  • 11. What types of tests are used to examine the gastrointestinal tract? 1. Fluoroscopy 2. Upper GI test 1. Types of Upper GI Tests 1. Barium swallow (esophagography) 2. Upper GI series 3. Small bowel series 3. Lower GI test 1. Types of Lower GI Tests 1. Air contrast barium enema (also called double contrast barium enema) 2. Barium enema
  • 12. 4. Ultrasound  Transcutaneous  Endosonography 5. CT 6. MRI 7. Angiography
  • 13. 8. Radionuclide imaging  Inflammatory bowel disease  Gastro-oesophagel reflux  Gastric emptying  Bile reflux study  Meckel’s scan(A Meckel's scan is an imaging test used to detect a Meckel's diverticulum. This is a small, abnormal pocket that forms in the wall of your child's small intestine)  Gastrointestinal bleeding
  • 14.
  • 15. Fluoroscopy  Fluoroscopy is a type of X-ray that allows part of the body to be studied in motion and recorded on a video monitor.  This type of X-ray is used to examine the gastrointestinal (GI) tract (esophagus, stomach, small intestine, large intestine (colon) and rectum) so that your physician can detect abnormalities in the size, shape, position or functioning of these organs.
  • 16. Upper GI test  the patient drinks a contrast solution that contains barium.  The barium solution is sweetened and flavored, but does taste chalky.  As the barium passes through the digestive tract, it provides an outline of the swallowing process as well as the esophagus, stomach and part of the small intestine.
  • 17.  This test is used to diagnose –  hiatal hernias (Hiatal hernia is a condition in which the upper portion of the stomach protrudes into the chest cavity through an opening of the diaphragm called the esophageal hiatus. This opening usually is only large enough to accommodate the esophagus)  ulcers, tumors,  Diverticulitis (medical condition that causes inflamed pouches in the lining of your intestine)  esophageal varices (Esophageal varices are enlarged veins in the esophagus. They're often due to obstructed blood flow through the portal vein, which carries blood from the intestine, pancreas and spleen to the liver),  obstruction, narrowing, or enteritis (inflammation of the small intestine lining).
  • 18.  It may also be used to determine the causes of swallowing problems, reflux, abdominal pain, diarrhea, unexplained vomiting or weight loss or bleeding
  • 19. Contrast materials  used to improve pictures of the inside of the body produced by x-rays, computed tomography (CT), magnetic resonance (MR) imaging, and ultrasound  allow the radiologist to distinguish normal from abnormal conditions.  are not dyes that permanently discolor internal organs.
  • 20.  are substances that temporarily change the way x-rays or other imaging tools interact with the body  help distinguish or "contrast" selected areas of the body from surrounding tissue. By improving the visibility of specific organs, blood vessels or tissues, contrast materials help physicians diagnose medical conditions.
  • 21.  Barium-sulfate is the most common contrast material taken by mouth, or orally.  It is also used rectally and is available in several forms, including:  powder, which is mixed with water before administration  liquid  paste  tablet
  • 22.  used to enhance x-ray and CT images of the gastrointestinal (GI) tract, including:  pharynx  esophagus  stomach  the small intestine  the large intestine (colon)
  • 23. How safe are contrast materials?  Contrast materials are safe drugs; adverse reactions ranging from mild to severe do occur but severe reactions are very uncommon.  While serious allergic or other reactions to contrast materials are rare, radiology departments are well-equipped to deal with them.
  • 24. Side effects and adverse and allergic reactions  tell your doctor if these mild side effects of barium-sulfate contrast materials become severe or do not go away  stomach  cramps  diarrhea  nausea  vomiting  constipation
  • 25.  Tell your doctor immediately about any of these symptoms:  hives  itching  red skin  swelling of the throat  difficulty breathing or swallowing  hoarseness  agitation  Confusion  fast heartbeat  bluish skin color
  • 26. You are at greater risk of an adverse reaction to barium-sulfate contrast materials if:  you have a history of asthma, hay fever, or other allergies, which will increase your risk of an allergic reaction to the additives in the barium-sulfate agent.  you have cystic fibrosis, which will increase the risk of blockage in the small bowel.  you are severely dehydrated, which may cause severe constipation.  you have an intestinal blockage or perforation that could made worse by a barium-sulfate agent
  • 27. BARIUM  Barium suspension is made up of barium sulphate.  (barium carbonate is poisonous)  BaSO4 is an ionic salt of barium (Ba), a metallic chemical element with atomic number 56.
  • 28.  Unlike barium and many of its other salts, barium sulfate is insoluble in water and therefore very little of the toxic barium metal is absorbed into the body.
  • 29. Indications It is the preferential contrast agent for gastrointestinal (GI) examinations due to:  high attenuation of x-rays  lack of absorption from the gut into the body  lack of toxicity (in the gut)
  • 30. Contraindications  known or strongly suspected gastrointestinal perforation  may be used in evaluation for possible esophageal perforations  large volume aspiration risk  prior allergic reaction (rare)  left-sided colonic obstruction (relative contraindication)  if the barium cannot exit the colon, it has the potential to become inspissated and very hard, leading to a quite problematic constipation
  • 31. Complications  may cause a peritonitis if they leak into the peritoneal space.  Barium migration into the bloodstream, known as intravasation is a serious and rare complication  recent research suggests that these concerns are unfounded and no case reports of clinically-significant barium-induced pleural/mediastinal inflammation exist.
  • 32. Ba as Contrast agent  A non ionic suspension is used(for otherwise the barium particles would aggregate into clumps)  Ba particle size must be small(0.1-3 micrometer)  The resultant solution has the PH of 5.3 which makes it stable in gastric acid.
  • 33. Barium Studies For GI Tract s/no Type of study Proprietary name Density(W/V) Volume (ml) Parts to be examined 1 Barium swallow E-Z HD 250% 100 Oesophagus 2 Barium Meal E-Z HD 250% 135 Stomach 3 Barium follow through E-Z Paque 60-100% 300 Small bowel 4 Small bowel enema E-Z Paque 60% 1500 Small bowel 5 Barium enema Polibar 115% 500 Rectum,sigmoid colon,decening,transve rse and acending colon,caecum
  • 34.
  • 35. Doses and concentration of Barium Sulphate used S/NO STUDY TYPE CONCENTRATION (W/V) APPROX.QUA NTITY (ml) 1 Barium Swallow Single contrast 100% varriable Double contrast 250% varriable 2 Upper GIT study Single contrast 82-100% 300-350 Double contrast 200-250% 200 50% 500-600 3 Ba MFT Enteroclysis Single contrast 20% 800-1200 Double contrast 85% 200 4 Barium enema Single contrast 15-20% Varriable Double contrast 60-110% varriable 5 CT Abdomen 1-5% 800-1000
  • 36. Choice of contrast media  Non ionic contrast media are the prefered agents in almost all contrast rdiographic studies:  Low osmolarity  Higher radiographic density  Lower incidence of idiosyncreatic and nin iodiosyncreatic reactions
  • 37.  The only limiting factor in their widepread use is their cost.  The current trend is to weight the cost benefit of use of various contrast media.
  • 38. s/no study indication Agent used Comments 1 IVP Routine Ionic water soluble contrast Low cost Congestive heart failure in eldery children Non ionic water soluble contrast agents Low osmolarity, therefore less hemodynamic impact. Less water loss through kidney Atropy,asthama,p revious drug or contrast reaction Non ionic water soluble Low incednce of idiosyncrar=tic reaction as compared to ionic contrast agent 2 GIT STUDIES Routine single contrast 95% w/v BaSo4 suspension Routine double contrast 250% w/v BaSo4 suspension
  • 39. s/no study indication Agent used Comments 2 (contd) Ba Swallow H/O aspiration in child Non ionic water soluble contrast Because of its high osmolarity ionic contrast agents draw water into alveoli if aspirated, causing sever pulmonary odema. Therefore ionic contrast agents are totally contraindicated in these conditions,and non ionic agents are used Suspected tracheo- oesophageal fistula Oesophageal perforation Ionic or non ionic contrast agents Leakage of BaSo4 into mediastinum can lead to mediastinal fibrosis 3 Ba Meal or Ba Enema Routine BaSo4 suspension •Abdominal trauma •Perforation peritonitis •Post operative Water soluble contrast agent Ionic or non ionic agents may be used as BaSo4 suspension. Leakage can cause peritoneal adhesion and uretric or bowel obstruction
  • 40. s/no study indication Agent used Comments 3 Ba Meal or Ba Enema Pre operative Water soluble contrast agent Study with BaSo4 suspension will preclude any abdominal surgery for 7 days Meconium ileus Ionic contrast agent Because of their high osmolarity these agents draw water into bowel lumens and can soften the meconium and relive obstruction.
  • 41. s/no study indication Agent used Comments 4 Follow through examination Suspected large bowel obstruction Water soluble contrast BaSo4 suspension can cause impaction because of water resorption in colon. Ideally in these conditions a barium enema or colonscopic examination must be done. If, however , an oral follow through contrast examination is indicated a water soluble contrast agent should be used. 5 angiography Cerebral angiograph y routine Non ionic contrast media •Non ionic contrast media are more comfortable in a conscious patient as they cause less vasodialation •Na+ containing ionic contrast agents are toxic to vascular endothelium and may cause disruption of BBB and cerebral odema. So if ionic contrast are used meglumine salts are prefered over Na+.
  • 42. s/no study indication Agent used Comments 5 angiogr aphy Renal arteriography Non ionic contrast media Ionic contrast media can causse renal tubular damage and therefore best avoided for this application. Coronary arteriography Nonionic contrast media •They have safe hemodynamics and myocardial profile. •Experimental research suggests that addition of Na + to these agents reduce the risk of arrhythmias associated with the procedures. Ionic contrast agents •If use, these agents should have physiological level of Na+ which reduces the risk of arrhythmias. •Pure solutions of both meglumine and Na+salts is cardiotoxic, therefore a combination of the two should be used. •Should have Ca++ binding property, therefore Ca++ EDTA is used as a stablising agent instead of Na+EDTA.
  • 43. s/no study indication Agent used Comments 5 angiography Peripheral arteriography routine Non ionic contrast agent Prefered as they cause less pain, warmth and discomfort and obviate the need of general anethesia. Ionic dimer agent(Hexa brix) Second best to non ionic contrast agents, but have toxicity for vascular endothelium because of Na+ content. If used, meglumine containing salts are prefered as Na + containing salts are toxic to vascular endothelium and cause more pain Ionic monomers Angiography with angioplasty Ioxaglate(H exabrix): It is preferred agent for angiography because of its antip;atelet and antithrombotic action. Ionic dimer Bacause of its Na+ content, it maintains physiological level of Na+ and therefore preferred in coronary interventions.
  • 44. s/no study indication Agent used Comments 5 Angiograph y Peripheral angiography in patient with previous sever contrast reaction CO2 CO2 has been used as a negative contrst for peripheral angiography using digital substraction unit with varriable results. Renal or peripheral angiography ina a patient with renal failure Gadolini um chelates Radiodensity of Gd is less than iodine and their cost is high. But theoritically Gd chelated can be used in patients with renal failures, because of their safe profile in such patients. 6 CT Routine abdominal scanning Iodinate d contrast agent 2- 5 % w/v Poor taste and acceptance by the patiens. Because of osmotic movement of water across the bowel mucosa, there is dilution of contrast at the interphase of mucosa and bowel lumen. Therefore mucosal delineation is less clear compared to BaSO4 suspension.
  • 45. s/no study indication Agent used Comments 6 CT Routine abdominal scanning BaSO4 suspension 1- 3% Gives better delineation of mucosa than iodinated water soluble agents. water Gives excellent bowel wall details when used with intravascular contrast enhancement in high resolution fast scanning syatem
  • 47.  Pharynx, (Greek: “throat”) cone-shaped passageway leading from the oral and nasal cavities in the head to the esophagus and larynx.  The pharynx chamber serves both respiratory and digestive functions.  Extends from base of the skull to the T6.
  • 48.  The anterior portion is the nasal pharynx, the back section of the nasal cavity.  The nasal pharynx connects to the second region, the oral pharynx, by means of a passage called an isthmus.  The oral pharynx begins at the back of the mouth cavity and continues down the throat to the epiglottis, a flap of tissue that covers the air passage to the lungs and that channels food to the esophagus
  • 49.  The third region is the laryngeal pharynx, which begins at the epiglottis and leads down to the esophagus.  Its function is to regulate the passage of air to the lungs and food to the esophagus.
  • 50.  The oesophagus is a fibromuscular tube, approximately 25cm in length, that transports food from the pharynx to the stomach.  It originates at the inferior border of the cricoid cartilage (C6) and extends to the cardiac orifice of the stomach (T11).  The oesophagus passed via a hole in the diapgragm called oesophageal hiatus which is situated at the level of the 10th thoracic vetebra
  • 51.  Oesophageal Sphincters  There are two sphincters present in the oesophagus, known as the upper and lower oesophageal sphincters.  They act to prevent the entry of air and the reflux of gastric contents respectively.
  • 52.  Upper Oesophageal Sphincter  The upper sphincter is an anatomical, striated muscle sphincter at the junction between the pharynx and oesophagus.  Normally, it is constricted to prevent the entrance of air into the oesophagus.  Lower Oesophageal Sphincter  The lower oesophageal sphincter is a physiological sphincter located in the gastro-oesophageal junction (junction between the stomach and oesophagus)..
  • 53. Recommended imging procedures  Ba examination/endoscopy (most common)  Radionuclide imaging(to acess gastro- oesophageal reflux)  Ct and MRI (to determine the extent of oesophageal carcinoma and for radiotherapy planning)
  • 54. Barium swallow Normal Ba Swallow Barium swallow showing esophageal dilatation and beaking Ba swallow showing cervical stricture
  • 55.  Indication  Dysphagia (most common)  Carcinoma of oesophagus  Oesophageal strictures, varices and ulceration  Hiatus hernia  Oesophageal reflux  Anaemia  Pain  Assessment of tracheo-oesophageal fistulae  Assessment of site of perforation
  • 56. Contraindication  Oesophageal perforation esulting in leakage into mediastinal,pleural or periotenal cavities  In such case it is normal to commene the examination using a water based ionic contrast agent.
  • 57. Preliminary film  A control film is advised prior to a water soluble study if perforation is suspected.
  • 58. Imaging technique  The patient is in the erect, right anterior oblique (RAO) position to throw the oesophagus clear of the spine.  An ample mouthful of barium is swallowed, and spot films of the upper and lower oesophagus are taken.  Oesophageal varices are better seen in the prone, right posterior oblique (RPO) position, as they will be more distended.
  • 59.  the patient is turned prone and placed in the right anterior oblique position with a bolster under the rib cage.  The patient is observed drining barium via straw to demonstrate the presense of hiatus hernia.  A hiatal hernia is when your stomach bulges up into your chest through an opening in your diaphragm, the muscle that separates the two areas. The opening is called the hiatus, so this condition is also called a hiatus hernia.
  • 60. Complications 1. Leakage of barium from an unsuspected perforation 2. Aspiration.
  • 61. Stomach and small bowel  the stomach lies between the oesophagus and the duodenum (the first part of the small intestine). It is in the left upper part of the abdominal cavity.  The four main sections of the stomach are the cardia, fundus, body, and pyloric part.
  • 62.
  • 63.  The small intestine (small bowel) lies between the stomach and the large intestine (large bowel) and includes the duodenum, jejunum, and ileum.  The small intestine is so called because its lumen diameter is smaller than that of the large intestine, although it is longer in length than the large intestine.
  • 64.  The duodenum continues into the jejunum at the duodenojejunal junction or flexure, which lies to the left of L2 vertebra and is fixed to the retroperitoneum by a suspensory ligament of Treitz.  The inferior mesenteric vein (IMV) lies to the left of the duodenojejunal junction.
  • 65.
  • 66.  From proximal (at the stomach) to distal, these are the duodenum, jejunum, and ileum  The shortest region is the 25.4-cm (10- in) duodenum, which begins at the pyloric sphincter.  subdivided into four segments: the superior, descending, horizontal, and ascending duodenum.
  • 67.  The jejunum is about 0.9 meters (3 feet) long (in life) and runs from the duodenum to the ileum.  The ileum is the longest part of the small intestine, measuring about 1.8 meters (6 feet) in length.
  • 68. Recommended studies  Barium meal (to investigate the stomach and the proximal portion of the small bowel.  Hypotonic duodenography can provide additional information where lesions of the duodenogram are suspected including lesions of the head of pancrease.  Small bowel enema and barium follow through( to examine the small bowel in its entirety)
  • 69.  Fibreoptic endoscopy (examination of the upper GI Tract and used particularly in the assessment of the gastric wall and assiociated viscera)  Radionuclied imaging(assess the rate of gastric emptying.also in Mickel’s diverticulum and inflammatory bowel disease)  CT (to investigate mass lesion of assiociated structures such as pancrease.)  USG (can be used in the case of pyloric stenosis to measure the antral wall thickness but isnot the modality of choice.)
  • 70. BARIUM MEAL  Methods 1. Double contrast – the method of choice to demonstrate mucosal pattern. 2. Single contrast – uses:  a. children – since it usually is not necessary to demonstrate mucosal pattern  b. to demonstrate gross pathology only
  • 71. Indications  1. Failed upper gastrointestinal endosocpy  2. Dyspepsia  3. Weight loss  4. Upper abdominal mass  5. Gastrointestinal haemorrhage (or unexplained iron-deficiency  anaemia)  6. Partial obstruction  7. Assessment of site of perforation – it is essential that a watersoluble  contrast medium, e.g. Gastrografin or LOCM, is used.
  • 73. Patient preparation  1. Nil orally for 6 h prior to the examination  2. It should be ensured that there are no contraindications to the  pharmacological agents used.  Preliminary film  None.
  • 74.
  • 75.  The double contrast method:  1. A gas-producing agent is swallowed.  2. The patient then drinks the barium while lying on the left side,supported by the elbow.  This position prevents the bariumfrom reaching the duodenum too quickly and so obscuring the greater curve of the stomach. Technique
  • 76.  3. The patient then lies supine and slightly on the right side, to bring the barium up against the gastro-oesophageal junction.  This manoeuvre is screened to check for reflux, which may be revealed by asking the patient to cough or to swallow water while in this position.  The significance of reflux produced by tipping the patient’s head down is debatable, as this is an unphysiological position.  If reflux is observed, spot films are taken to record the level to which it ascends.
  • 77.  4. An i.v. injection of a smooth muscle relaxant (Buscopan 20mg or glucagon 0.3mg) is given.  The administration of Buscopan has been shown not to affect the detection of gastrooesophageal reflux or hiatus hernia.  5. The patient is asked to roll onto the right side and then quickly over in a complete circle, to finish in an RAO position.  This roll is performed to coat the gastric mucosa with barium. Goodcoating has been achieved if the areae gastricae in the antrum are visible.
  • 78.
  • 79.
  • 80.
  • 81.  From the left lateral position the patient returns to a supine position and then rolls onto the left side and over into a prone position.  This sequence ofmovements is required to avoid barium flooding into the duodenal loop, which would occur if the patient were to roll onto the right side to achieve a prone position.
  • 82.  2. Spot film of the duodenal loop (lying):  a. Prone – the patient lies on a compression pad to prevent barium from flooding into the duodenum.  An additional view to demonstrate the anterior wall of the duodenal loop may be taken in an RAO position
  • 83.  3. Spot films of the duodenal cap (lying):  a. Prone  b. RAO – the patient attains this position from the prone position by rolling first onto the left side, for the reasons mentioned above  c. Supine  d. LAO.
  • 84.  4. Additional views of the fundus in an erect position may be taken at this stage, if there is suspicion of a fundal lesion.  5. Spot films of the oesophagus are taken, while barium is being swallowed, to complete the examination
  • 85. Aftercare  1. The patient should be warned that his bowel motions will be white for a few days after the examination and may be difficult to flush away.  2. The patient should be advised to eat and drink normally to avoid barium impaction. Laxatives may be taken if required.  3. The patient must not leave the department until any blurring of vision produced by the Buscopan has resolved.
  • 86. Complications  1. Leakage of barium from an unsuspected perforation  2. Aspiration of stomach contents due to the Buscopan  3. Conversion of a partial large bowel obstruction into a complete obstruction by the impaction of barium  4. Barium appendicitis, if barium impacts in the appendix (exceedingly rare)  5. Side-effects of the pharmacological agents used.
  • 87. BARIUM FOLLOW-THROUGH  Methods  1. Single contrast  2. With the addition of an effervescent agent  3. With the addition of a pneumocolon technique.  Indications  1. Pain  2. Diarrhoea  3. Anaemia/gastrointestinal bleeding  4. Partial obstruction  5. Malabsorption  6. Abdominal mass.
  • 88.  Contraindications  1. Complete obstruction.  2. Suspected perforation (unless a water-soluble contrast medium is used).
  • 89.  Patient preparation  Metoclopramide 20mg orally may be given before or during the examination.  Preliminary film  Plain abdominal film is used if small bowel obstruction is thought possible.
  • 90. Technique  The aim is to deliver a single column of barium into the small bowel.  This is achieved by laying the patient on his right side afterthe barium has been ingested.  Metoclopramide enhances the rate of gastric emptying. If the transit time through the small bowel is found to be slow, the addition of an osmotic water-soluble contrast agent may help to speed it up.
  • 91.  If a follow-through examination is combined with a barium meal, glucagon is used for the duodenal cap views rather than Buscopan because it has a short length of action and does not interfere with the small-bowel transit time.
  • 92.  Films  1. Prone PA films of the abdomen are taken every 15–20 min during the first hour, and subsequently every 20–30 min until the colon is reached.  The prone position is used because the pressure on the abdomen helps to separate the loops of small bowel.  2. Spot films of the terminal ileum are taken supine, using a compression pad.
  • 93.  Additional films  1. To separate loops of small bowel:  a. compression with fluoroscopy  b. obliques  c. with X-ray tube angled into the pelvis  d. with the patient tilted head down.  2. To demonstrate diverticula: erect film – this position will reveal any fluid levels caused by contrast medium retained within the diverticula.
  • 94.  Barium meal follow-through in the 70-year-old patien
  • 95. Lets ponder!!! 1. Preliminary film in any examination is taken for: I. To make adjustments in exposure factors II. To check patient position III. To demonstrate, identify and localise opacities IV. All of above
  • 96. II. Indication for water soluble contrast media is: a) Suspected perforation b) Ileocaecal TB c) Constipation d) Gastroesophageal reflux disease
  • 97. 3) Buscopan is contraindicated in all except: 1. Myasthenia gravis 2. Paralytic ileus 3. Pyloric stenosis 4. Open angel glaucoma
  • 98.  Water insoluble contrast media is used in all except: 1. Barium meal folloe through 2. Barium swallow 3. Sinogram 4. Barium eneme
  • 99.  The method of choice to demonstrate mucosal pattern in Ba studies is: 1. Single contrast 2. Non contrast 3. Double contrast 4. intravenous
  • 100.  In Ba meal sequence antrum and body of stomach are visualised in the position: 1. Supine 2. Left ant obq 3. Right post obq 4. Left lateral
  • 101. Reference  A guide to radiological procedures.  Research gates  Radiopedia  Clark’s Special procedure in diagnostic imaging.  Satish Bhargabhawa  Radiology refrense articles  BD Chaurasya anatomy book  NCBI book Self  MCQs in Radiology for Residents and Technologists- Sumeet Bhargava and Satish K Bhargava
  • 102. AIR AND FEELINGS ARE NOT ONLY THE POWERFUL THINGS YET INVISIBLE. WE HAVE SOMETHING MORE TO IT. NAME IT X-RAY. -Kajal Jha

Editor's Notes

  1. The Primitive gut tube develops during week 3-4 by incorporating the yolk sac during craniocaudal and lateral folding of the embryo. The tube is divided into 3 distinct sections; foregut, midgut and hindgut. Foregut gives rise to the esophagus, stomach, liver, gallbladder, bile ducts, pancreas and proximal duodenum. The midgut develops into the distal duodenum, jejunum, ileum, cecum, appendix, ascending colon, and proximal 2/3 of transverse colon. The hindgut becomes the distal 1/3 of the transverse colon, descending colon, sigmoid colon and the upper anal canal.
  2. Germ layers, formed during gastrulation, are present by two weeks and include endoderm, mesoderm and ectoderm. In humans, the germ tissues are the basis of all tissues and organs.  Endoderm - Epithelial lining and glands  Mesoderm - Lamina propria, muscularis mucosae, submucosa, muscularis externa and serosa  Ectoderm - Enteric nervous system and posterior luminal digestive structures .
  3. Fluoroscopy shows a continuous X-ray image on a monitor, much like an X-ray movie. During the procedure, an X-ray beam is continuously passed through the specific body part being examined. The images are transmitted to a monitor to evaluate the organ’s movement. The doctors can visualize many body parts, such as the digestive, skeletal, respiratory, urinary, and reproductive systems. In some instances, interventional fluoroscopy is performed. It uses ionizing radiation to guide small instruments such as catheters through blood vessels. It is a promising procedure because it’s less invasive that only requires a small incision. It substantially reduces the risk of infection and can promote a briefer recovery time, compared to conventional surgical procedures.
  4. When introduced into the body prior to an imaging exam, contrast materials make certain structures or tissues in the body appear different on the images than they would if no contrast material had been administered. Contrast materials help distinguish or "contrast" selected areas of the body from surrounding tissue. By improving the visibility of specific organs, blood vessels or tissues, contrast materials help physicians diagnose medical conditions. Contrast materials enter the body in one of three ways. They can be: swallowed (taken by mouth or orally) administered by enema (given rectally) injected into a blood vessel (vein or artery; also called given intravenously or intra-arterially)
  5. An element (also called a "chemical element") is a substance made up entirely of atoms having the same atomic number; that is, all of the atoms have the same number of protons. Hydrogen, helium, oxygen, nitrogen, carbon, gold, silver, lead, and uranium are well-known examples of elements
  6. It can also be found in some oral contrast preparations used for CT.  Barium can be mixed into high-density or low-density suspensions. Both suspensions typically attenuate x-rays more than water-soluble contrast. High-density barium is preferred over water-soluble contrast for fine-detail evaluation of the gastrointestinal system (e.g. evaluation for early changes from Crohn disease). Suspensions created for CT use are very low density. Due to its insolubility in water, barium sulfate contrast media are supplied as fine particles of the barium sulfate suspended in water. Often artificial flavourings are added to make the mixture more palatable. Its allergy profile is favourable with very few reported reactions 1. Historically, allergy was more common when excipients, such as chocolate, were used 1.
  7. Complications Barium contrast agents may cause a peritonitis if they leak into the peritoneal space. If bowel perforation is suspected, water-soluble contrast is generally preferred 3. The evidence that barium causes a pleuritis and/or mediastinitis if it leaks into the pleural space and/or mediastinum respectively is weak. The initial work establishing a relationship between barium and pleuritis was performed in cats and the analogy extended to humans on theoretical grounds 4. However more recent research suggests that these concerns are unfounded and no case reports of clinically-significant barium-induced pleural/mediastinal inflammation exist. When looking for an esophageal tear, barium is safe to use after ruling out a large leak with water soluble-contrast 5. Barium contrast is not directly toxic to the airways (unlike hyperosmolar water-soluble contrast (e.g. Gastrografin)), and in the past it has even been used to create bronchograms 6. Barium does, however, have the potential to plug the distal airways, diminishing the capacity for gas exchange, and barium aspiration may rarely be fatal 8. Barium migration into the bloodstream, known as intravasation is a serious and rare complication, with the potential to cause fatal end-organ emboli - especially pulmonary, although it is incredibly rare if the contrast is used appropriately
  8. Anatomical Course The oesophagus begins in the neck, at the level of C6. Here, it is continuous superiorly with the laryngeal part of the pharynx (the laryngopharynx). It descends downward into the superior mediastinum of the thorax, positioned between the trachea and the vertebral bodies of T1 to T4. It then enters the abdomen via the oesophageal hiatus (an opening in the right crus of the diaphragm) at T10. The abdominal portion of the oesophagus is approximately 1.25cm long – it terminates by joining the cardiac orifice of the stomach at level of T11.
  9. Modification of technique To demonstrate a tracheo-oesophageal fistula in infants, a ‘pull back’ nasogastric tube oeosophogram may be performed. A nasogastric tube is introduced to the level of the mid-oesophagus, and the contrast agent (barium or LOCM) is syringed in to distend the oesophagus. This will force the contrast medium through any small fistula which may be present. It is important to take radiographs in the lateral projection during simultaneous injection of the contrast medium and withdrawal of the tube. Although some authors recommend that the infant be examined in the prone position whilst lying on the footstep of a vertical tilting table, satisfactory results are possible with children on their side on a horizontal table. It is important to watch for any possibility of aspiration into the airway from overspill. Overspill may lead to the incorrect diagnosis of tracheo-oesophageal fistula if it is not possible to determine whether contrast medium in the bronchi is due to a small fistula which is difficult to see or to aspiration. Recently, it has been proposed that pull-back studies are not necessary in the majority of children, as tracheo-oesophageal fistulas can usually be demonstrated on standard contrast swallow examination, providing the oesophagus is distended well with contrast media.1 Pull-back studies are still necessary for intubated patients, or those who are at high risk of aspiration. It is important to remember that fistulas are usually quite high, and the orifice can be occluded by an endotracheal tube. This can prevent the fistula being opacified. This can be rectified by altering the patients position, or slightly withdrawing the ET tube.