The document discusses MRI equipment and safety. It summarizes that MRI machines have improved over time by becoming more open in design to reduce patient anxiety. The basic components of an MRI scanner are described, including the magnet, gradient coils, RF coils, patient table, and computer system. Safety is a key concern, with risks including the static magnetic field pulling in metallic objects, RF fields potentially causing tissue heating and burns, and ensuring a safe MRI environment.
basic and brief but informative knowledge about how MRI works and what are its components ... easy to understand as well as presenting during lectures and in classes . share it
this power-point slide presentation includes lots of information like how MRI coil works. what is shimming, magnet, fringe, and design of mri coil and also magnet. this will help a lot for radiologist and technician radiographers.. thanks.
basic and brief but informative knowledge about how MRI works and what are its components ... easy to understand as well as presenting during lectures and in classes . share it
this power-point slide presentation includes lots of information like how MRI coil works. what is shimming, magnet, fringe, and design of mri coil and also magnet. this will help a lot for radiologist and technician radiographers.. thanks.
This slide best explains the introduction of CT, basis and types of CT image reconstructions with detailed explanation about Interpolation, convolution, Fourier slice theorem, Fourier transformation and brief explanation about the image domain i.e digital image processing.
This slide best explains the introduction of CT, basis and types of CT image reconstructions with detailed explanation about Interpolation, convolution, Fourier slice theorem, Fourier transformation and brief explanation about the image domain i.e digital image processing.
This presentation discusees a brief history of the MRI, it's mechanism of action, applications in dentistry and recent advancements in its technology. Also it's advantages and disadvantages in comparison with the CT scan
MAGNETIC RESONANCE IMAGING QUESTION AND ANSWER 3 MARKS.pdfGanesan Yogananthem
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Attached is an essential document featuring comprehensive Questions & Answers for MAGNETIC RESONANCE IMAGING. We encourage you to utilize this resource to deepen your understanding and excel in your studies. Wishing you all the success in your academic endeavors and future careers.
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1 2OverviewIntroduction In this fast developing w.docxhoney725342
1
2
Overview/Introduction
In this fast developing world that is being made progress in every field of life, so how can the medical field be left behind in this race of development? Through this paper, I will cover one of the critical innovations in the medical technological field i.e. the introduction of the MRI in the diagnosis progress. This paper will describe approximately all the innovations that have been made in the category of MRI that still in the progress and also that are going to innovate in the future. These changes have totally changed the medicine field.
Outline
Part 01: Historical Journey of MRI in field of Medical Technologies
First introduced in 1950 to treat cataract by placing this lens permanently by the British ophthalmologist Dr. Harold Ridley Nikola Tesla discovered the Rotating Magnetic Field in 1882 in Budapest, Hungary. This was a fundamental discovery in physics.
Laboratory in Columbia University, New York City, observed the quantum phenomenon dubbed nuclear magnetic resonance (NMR).
Mike Goldsmith, one of the graduate students cobbled a wearable antenna coil to monitor the hydrogen broadcast detected by the coil.
Part 02: Importance of MRI in Medical Sciences
MRI is particularly useful for the scanning and detection of
abnormalities in soft tissue structures in the body like the cartilage tissues
and soft organs like the brain or the heart.
MRI scanners have helped the biotechnology world a whole lot since it has changed the way x-rays now operate.
Part 03: Structure of MRI and How Does It Work
The most important part of an MRI scanner is the magnet.
Most MRI scanners use a superconductive magnet.
There are also three Gradient magnets in MRI scanners.
Part 04: Uses and Implementation of MRI Technology
The MRI scanner is cylindrical tube surrounded by a circular magnet that contains the magnet and detectors. The patient lies on a moveable examination table that slides in and out of the center of the magnet.
There is also the specialized computer that processes all the imaging information, it is placed in a different room.
Patients must remove all metals, credit cards and other belongings before being placed into the scanner
There will be an interview here as primary research.
Part 05: Advantages/Disadvantages of MRI Technology
Advantages associated with MRI Technology are:
There is no involvement of any kind of radiations in the MRI, so
it is safe for the people who can be vulnerable to the effects of radiations
such as pregnant women or babies.
MRI scan can provide information about the blood circulation
throughout the body and blood vessels and also enabling the detection of
problems related to the blood
circulation.
Disadvantages associated with MRI Technology are:
MRI scan is done in an enclosed space, so the people who are
claustrophobic, i.e. fearful of being in a closely enclosed surface, are facing
problems with MRI to be done.
MRI scans involve really loud noises while proce ...
Magnetic Resonance Imaging or MRI Scanning as we commonly call it is a process where strong magnetic fields and radio waves are used to produce detailed images of the inside of a human body.Contact Us: Open MRI of Orlando 668 N. Orlando Avenue, Suite 1005 Maitland, FL 32751., Tel No: (407) 740-8848, Fax: 407-740-0324, Email: NewPatient@OpenMRIofOrlando.com
Atomic structure refers to the organization and composition of atoms, which are the fundamental building blocks of matter. Atoms are incredibly small and consist of several subatomic particles, primarily protons, neutrons, and electrons. Understanding atomic structure is essential in the field of chemistry and forms the basis for our understanding of the physical and chemical properties of elements and compounds.
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
NVBDCP.pptx Nation vector borne disease control programSapna Thakur
NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
New Drug Discovery and Development .....NEHA GUPTA
The "New Drug Discovery and Development" process involves the identification, design, testing, and manufacturing of novel pharmaceutical compounds with the aim of introducing new and improved treatments for various medical conditions. This comprehensive endeavor encompasses various stages, including target identification, preclinical studies, clinical trials, regulatory approval, and post-market surveillance. It involves multidisciplinary collaboration among scientists, researchers, clinicians, regulatory experts, and pharmaceutical companies to bring innovative therapies to market and address unmet medical needs.
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
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The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
How STIs Influence the Development of Pelvic Inflammatory Disease.pptx
Mri equipments
1. MAAJID MOHI UD DIN MALIK
LECTURER COPMS,
AU BATHINDA PUNJAB
MRI EQUIPMENTS
2. MRI machines vary in both size and shape. The
older designs had a more compact and small
space and were very closed. This affected the
patients mentally and usually scared them
even before they went in for the examination.
However, the engineers have tried to solve this
problem by improving the machine to be more
open and inviting. They have expanded the
sides and included much more space in
the scanner than the original models.
3. The basic design of a Magnetic Resonance
Imaging scanner is the same in almost all
machines. The scanner consists of a 24
inch wide tube, inside which the examination takes
place. It also contains:
A magnet,
Radio Frequency (RF) coil,
Gradient coils
Patient table, and
Computer system.
4.
5. MAGNET
The magnet is the most important and biggest part of the MRI
device. It is this magnet that allows the MRI machine to
produce high quality images. There is a horizontal tube that
runs through the magnet and is called a bore. The magnet is
extremely powerful and its strength is measured in either
‟teslaˮ or ‟gaussˮ (1 tesla = 10 000 gauss). Most MRI magnets
use a magnetic field of 0.5 to 2.0 tesla, when the Earth’s
magnetic field is only 0.5 gauss. The magnetic field
is produced by passing current through multiple coils that
are inside the magnet, resulting in a state of
superconductivity, which produces a lot of energy by reducing
the resistance in the wires to zero.
6.
7. GRADIENT COILS
There are three different gradient coils that are
inside the MRI machine and are located within
the main magnet. Each one of these produce
three different magnetic fields that are each
less strong than the main field. The gradient
coils create a variable field (x, y, z) that can be
increased or decreased to allow specific and
different parts of the body to be scanned by
altering and adjusting the main magnetic field.
8.
9. RADIO FREQUENCY (RF) COILS
The basic function of the RF coils is to transmit
radio frequency waves into the patient’s body.
There are different coils located inside the MRI
scanner to transmit waves into different body
parts. If a certain area of the body is specified,
then all the RF coils usually become focused
on the body part being imaged to allow for a
better scan.
10.
11. PATIENT TABLE
This component simply slides the patient into
the MRI machine. The position at which
the patient lies down on the table is determined
by the part of the body that is being scanned.
Once the part of the body under examination is
in the exact center of the magnetic field, which
is referred to as the isocentre, the scanning
process is started.
12. ANTENNA/COMPUTER SYSTEM
The antenna is a very sensitive device that easily
detects the RF signals emitted by a patient’s body
while undergoing examination and feeds this
information into the computer system. The computer
system is a powerful system, whose major function is
to receive, record, and analyze the images of the
patient’s body that have been scanned. It interprets
the data sent in by the antenna and then, helps to
produce an understandable image of the body part
being examined.
13.
14. MRI SAFETY
S = Search for Hazards
A = Analyze the Risk
F = Find the Cause
E = Eliminate the Cause
T = Tell Others
Y = You are Safe
15. MRI : IMAGING PRINCIPLE
Pt. is placed in magnet
Radio wave is sent in
Radio wave is turned off
Pt. emits a signal
Signal is received & used
for reconstruction of the
picture.
16. MRI ENVIRONMENT
MRI unit should be designed to restrict access
for unrelated persons.
A number of guidelines all over the world to
restrict the access in MRI.
But all have same objective to ensure safe MRI
environment every time.
One widely accepted approach is a 4 zone design
recommended by ACR.
18. SAFETY ISSUES: HISTORY
Used clinically since mid 1980
No known biological effects associated
with Bo of MRI, a no. of accidents have
occurred in MRI environment.
In 2001 a tragedy occurred when a 6yr
child was killed.
19.
20. SAFETY ISSUES: HISTORY
Blue Ribbon Panel of MRI Experts by ACR to produce
guidelines for MRI safety.
In 2oo2, “white paper” was published & intended to
provide guidelines for imaging facilities for development
& implementation of safety policies & procedure.
Since then it has been revised, rebutted & updated
periodically.
21. SAFETY ISSUES & RISK IN MRI
What are the safety concerns?
&
How can MRI be dangerous?
22. SAFETY ISSUES & RISK IN MRI
1. Static magnetic field:
• (Missile effect: devices, implants & projectiles)
2. RF magnetic field:
• (tissue heating, & thermal injuries)
3. The gradient magnetic field:
• (PNS, magneto- phosphine's & acousticnoise)
4. MRI contrast agent
23. STATIC MAGNETIC FIELD
Projectile or Missile Effect:
Translational and rotational attractive
forces on ferrous metallic objects
Ferrous metallic objects are drawn to
magnetic bore & can be easily pulled out
of hands, pockets etc.
This effect has caused several injuries &
death
26. June 03, 2017, at Dr.
Ram Manohar Lohia
Institute of Medical
Sciences in Lucknow,
Uttar Pradesh, :
Minister’s guard carries
gun during MRI scan
his pistol was pulled
from his body and got
stuck on the machine.
According to reports,
the cost for repairing
machine was around Rs
40-50 lakh.
28. RF MAGNETIC FIELD:
Heating of tissue: some tissues nuclei absorb RF energy &
enter higher energy state (less concern < 1T MR system).
Thermal injuries:
When conducting materials (e.g. cable of surface coil, ECG
lead), are placed within the RF field, current is produce in
conductive loop.
The concentration of electric current can cause excessive
heating that causes tissue burns.
Tissue burn is the most frequently reported adverse incident.
31. RF MAGNETIC FIELD RELATED BURN
Cloth containing anti-microbial solution or metal
infused material can heat & cause burn.
Medication patches & skin patches may have metallic
components that can also heat & cause burns.
32. “A patient with an implanted intracranial
aneurysm clip died as a result of an attempt to
scan her”
33. WHILE PREPARING PT FOR MRI
Always Remember………………
Screen
Change
Explain