This document discusses quality control and quality assurance for x-ray machines. It outlines various tests that should be conducted, including central beam alignment, focal spot size, tube voltage, and timer checks. These tests help ensure the machine is functioning properly and producing high quality images. Acceptable tolerances and testing frequencies are provided. The roles of the quality assurance committee, including the medical physicist, radiologist, biomedical engineer, and technicians are described.
Quality Assurance Programme in Computed TomographyRamzee Small
Introduction to Computed Tomography
Basic description of the components of a CT System
Introduction to Quality Assurance
Quality Assurance and Quality Control Tests in Computed Tomography base on frequency
Objective of QA/QC Test
Brief definition of Multi-modality Diagnostic facility, Teleradiology, PACS, RIS, Quality Assurance Programme
Explanation of the Quality assurance Committee
Introduction to Chest X-ray technology and CR cassette
Quality Control Tests for Chest x-ray Technology
Introduction to Fluoroscopy Technology
Quality Control test for Fluoroscopy
Quality Assurance Program Review Test
Quality Assurance Drawback
Quality Assurance Programme in Computed TomographyRamzee Small
Introduction to Computed Tomography
Basic description of the components of a CT System
Introduction to Quality Assurance
Quality Assurance and Quality Control Tests in Computed Tomography base on frequency
Objective of QA/QC Test
Brief definition of Multi-modality Diagnostic facility, Teleradiology, PACS, RIS, Quality Assurance Programme
Explanation of the Quality assurance Committee
Introduction to Chest X-ray technology and CR cassette
Quality Control Tests for Chest x-ray Technology
Introduction to Fluoroscopy Technology
Quality Control test for Fluoroscopy
Quality Assurance Program Review Test
Quality Assurance Drawback
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.
AREA MONITORING DEVICES BY ZUBAIRUL ISLAM.pptxZubairUlIslam5
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A Student Of Radiography.
Area Monitoring Devices is One of the Important in the Radiography.
• Area monitoring ( INTRODUCTION) • why we need Area monitoring •Area monitoring Devices
IONISATION CHAMBER
GM COUNTER
SCINTILLATION DETECTOR
AIM AND OBJECTIVE OF AREA MONITORING DEVICE
RADIATION MEASUREMENT
DEFECTORS
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.
AREA MONITORING DEVICES BY ZUBAIRUL ISLAM.pptxZubairUlIslam5
AREA MONITORING DEVICES BY ZUBAIRUL ISLAM
A Student Of Radiography.
Area Monitoring Devices is One of the Important in the Radiography.
• Area monitoring ( INTRODUCTION) • why we need Area monitoring •Area monitoring Devices
IONISATION CHAMBER
GM COUNTER
SCINTILLATION DETECTOR
AIM AND OBJECTIVE OF AREA MONITORING DEVICE
RADIATION MEASUREMENT
DEFECTORS
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Analytical method qualification consists of a simplified evaluation of a subset of validation characteristics with a goal to demonstrate that an analytical method is scientifically sound and suitable for its intended use. In contrast to validation, analytical method qualification is performed without predefined acceptability criteria. Qualification may be performed as a prerequisite to method validation, or when an assay for product knowledge has not yet been established as a test for a critical product quality attribute. Qualification of equipment is pre-requisite for validation of the process in which the equipment is being used. Many types of equipment have measuring devices on them. Calibration of measuring devices is a part of qualification. Calibration of measuring devices is important, as the data is often collected through them. If the data collected is not from measuring devices that have been calibrated, the data cannot be relied upon. Thus the whole validation exercise can be questioned.
The analyst is required to analyze a number of QC samples throughout the run where there are decisions to be made based on a window of acceptance for each QC sample analyzed.
This presentation explains about qualifications of HPTLC, types of qualifications, design qualification , installation qualification ,operational qualification, performance qualification ,documentation of qualification .
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This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
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The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
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The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
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2. TOPIC TO BE DISCUSSED:
• QUALITY CONTRO AND QUALITY ASSURANCE
• TEST TO BE DONE TO CONTROL QUALITY
• LEVELS OF QUALITY CONTROL(FREQENCY)
• TOOLS REQUIRED
• PROBLEM BASED AREAS.
3. QUALITY CONTROL
• Series of tests to assure radiographic system
is functioning properly and radiographs are of
acceptable quality.
• Quality control tests should be conducted for
x ray machines.
• logs of tests performed dates results and
corrective action should be kept.
4. QUALITY ASSURANCE
• An organized effort by staff operating a facility
to ensure that the diagnostic image produced
are of a sufficiently high quality so that they
consistently provide adequate diagnostic
information at the lowest possible cost and
with the least possible exposure of the patient
to radiation
5. QUALITY ASSURANCE PROGRAM
• THIS PROGRAM HAS MANY FACETS
INCULDING
1) QUALITY COTROL TESTS
2 )ADMINSTRED PROCEDURE
3 )PREVENTIVE MAINTANCE PROCEDURE
4 )TRANING
6. QUALITY CONTROL TESTS
1 )CENTRAL BEAM ALIGNMENT
2)FOCAL SPOT SIZE
3)TUBE VOLTAGE
4)TIMER CHECK
5)TUBE HOUSING LEAKAGE
7. CENTRAL BEAM ALIGNMENT
• If the x ray beam is not perpendicular to the
image receptor ,the image may be distorted
• If grid is used the distortion will be magnified
resulting in total loss of minute details.
8. FOCAL SPOT SIZE
• The ability for resolving the smallest size of
the image (i.e. Details) in a radiograph
depends on the focal spot size.
• Since, the focal spot size may be altered as a
result of bombardment of electrons on the
target, it has to be checked periodically to
ensure that focal spot size is within acceptable
limits.
9. TUBE VOLTAGE(KVP)
• The applied kvp affects the quality and
quantity of x-rays reaching the image
receptors.
• If there is variation in kvp setting, it will affect
the image quality, hence it is necessary to
check the kvp settings periodically.
10. TIMER CHECKING
• If the exposure time set on the diagnostic x-ray
unit is not optimal, the radiograph can be under
exposed or over exposed.
• This may lead to repeat examinations. Hence,
there is a need to test the timer of the x-ray unit
periodically.
11. TUBE HOUSING LEAKAGE
• The leakage of radiation from r-ray tube
housing adds the radiation dose to the patient
and to the operator too.
• Tube housing leakage test must be periodically
done to insure the radiation safety.
12. TOOLS REQUIRED
BEAM ALIGNMENT TEST TOOL
• Beam alignment test tool is kept on the collimator
test tool, such way that the stainless steel ball of
lower side of tool is just above the centre of the
collimator test-tool. the film is exposed and
processed.
• If the beam alignment is perfect, the image of the
top ball will merge with the image of the ball at the
bottom. The deviation of beam from the
perpendicular is determined from the location of
the image of top ball in the circles in the
radiographs.
14. FOCAL SPOT TEST TOOL
• Test tool consist of hollow cylinder with an acrylic
circular disc fastened at one end which contains 12
groups of bar patterns ingraved on a tungsten plate.
• Each group consist of 6 lines-sub group of 3 parallel
lines,perpendicular to another sub group whose
size and spacing decreases by steps of 16%.
• The focal spot size value are computed for
magnification of 4/3 being ffd 60cm and OFD 45.as
shown in table:
15.
16. • Test tool placed on a non screen cassette loaded
with film,(ffd 60 cm )constant such that vertical
pattern are within the anode to cathode direction.
• Film is exposed and processed and bar pattern on
radiograph is observed-smallest group on which all
6 bars are clearly resolved is identified and
corresponding focal spot size can be obtained from
the table.
18. TIMER CHECKING
SPINNING TOP TEST TOOL
• Spinning top test tool is used to check the
exposure time. It consist of a rotating circular
brass plate with small rectangular portion
cut(hole) at its periphery.
• The tool is placed on the cassette, loaded with
film. For a set time, the unit is energized, while
the top is rotating.
• The pulses passing through the hole of the
circular plate, produces equally spaced
rectangular density patterns, on the film.
20. TUBE VOLTAGE
Kvp METER
• Kvp meter,employes two solid state detector
with different beam hardening filters.when
exposed to radiation,the ratio of the signals
produced by these detectors will be proportional
to the peak tube voltage.
• Corrections for beam filtration should be applied
if necessary .
22. TUBE HOUSING LEAKAGE
RADIATION SURVEY METER
• The radiation leakage measurement is carried
with an ionization radiation survey meter. For
checking the leakage radiation,the collimator of
the tube housing is fully closed and the tube is
energized at maximum rated tube potential and
current at that kvp.
• The exposure rate at one meter from the target
is measured at different location from the tube
housing and collimator .
• The tolerance limit of leakage radiation at 1 m
from the focus is >115 mR in one hour
24. FREQUENCY OF QUALITY CONTROL.
Test Frequency
kVp Once in three year
Timer Once in 3 months
Output,mR/ mAs Monthly
Inherent filtration Once in 3 months
Focal spot size Once in a year
Central beam alignment Once in 2 months
Congruence of radiation and
optical field
Once in 2 months
Grid alignment Annually and whenever film
density appears non uniform
25. QA COMMITTEE & THEIR ROLE
• Includes:
Medical physicist
Radiologist
Biomedical engineer
Imaging technologist (radiographer)
IT technician
26. MEDICAL PHYSICIST
• Conducting test to ensure the safety and proper
performance of imaging equipment used.
• Assignment of biomedical engineering service
staff for corrective maintenance or preventive
actions
• Training of personal utilized for quality control.
• Develop and implement a radiation protection
program.
27. RADIOLOGIST
• Determine the overall quality of the output image
• Select the technologist to be the primary QC
technologist, performing the prescribed QC test.
• Ensure that appropriate test equipment and
materials are available to perform the QC tests.
• Ensuring that medical physicist and radiographers
have adequate training and continuous education.
29. IMAGING TECHNOLOGIST AND
RADIOGRAPHER
• Ensuring that the appropriate protocol and
technique factors are used for the requested
examination
• Ensuring that the QC tests are performed,
interpreted and recorded appropriately.
• Perform all the checks for the daily ,monthly
and quarterly QC testing of equipment.
• Report faults immediately, any deviation in
trend of equipment performance to QA
manager
• Undertaking additional continuous education
courses.
30. IT TECHNICIAN
• Maintenance of the integrity of
system database to ensure
continuous and accurate
operation of the information
systems