QA/QC Flashcards
_____ are tools to optimize the performance of x-ray facility personnel and fluoroscopic and ancillary equipment operation..
Quality assurance & Quality Control
_____- test are designed to detect slowly evolving x-ray equipment abnormalities
QC test
What is the major reason for QA program program?
to optimize diagnosis and the benefits obtained
What are the 4 major steps in QA
- Acceptance testing
- Establishment of baseline performance equiment
- Diagnosis of changes in equipment performance
- Verification of correction
When should verification in writing be done to show that the equipment is safe and in proper condition
- Prior to initial use
- Yearly after initial verification
- After repairs
What should the QA manual include?
- Supervision of QA
- Performing QC test
- Repairing or servicing of fluoro and ancillary equipment
Records of all QC test should be kept for how long?
3 years
What are the test verification that should be done on a daily basis
- Brightness/ contrast of tv monitor
- Verification of protective devices such as : lead curtains, Lead panel, Bucky slot cover & fluoro tower locks
- Collimation
- kVp & mA monitoring
- Compression device
What phantom should be used to test brightness / contrast of tv monitor
step wedge
_____ is permanently attached to the mobile c-arm and provides provides for a source-skin distance of not less than 12 inches,
cones/ spacers
____ is leakage and scattered radiation.
stray radiation
____ barrier sufficient to attenuate stray radiation to the required degree
secondary protective barrier
_____ is part of the radiation which passes through the window, aperture, cone, or other collimating device of the tube housing.
Useful beam
barrier sufficient to attenuate the useful beam to the required degree
Primary protective barrier
___ is material placed in the useful beam to absorb preferentially the less penetrating radiations.
filtration
What is the purpose of filtration
to remove low energy x-rays before they reach the patient
What are the different types of filtration
- Added filter ( placed in direct path ox x-ray beam)
- Inherent filter ( x-ray tube and housing)
- Total filtration ( The sum of the inherent and added filters)
Sheets of metal (usually aluminum or its equivalent) that are placed in the direct path of the X-ray beam.
Added filter
____ The X-ray tube and its housing such as the glass envelope (window) through which the X-ray beam passes.
Inharent filter
Term for The sum of the inherent and added filters
Total filtration
Regulations require the total filtration permanently in the useful x-ray beam at normal operating voltages may not be less than _____equivalent for fluoroscopy.
2.5 mm AL
the intensity of the x-ray beam at the tabletop of a fluoroscope should not exceed _____rads/min for each mA of operating tube current at 80 kVp.
2.1- 2.2 rads/ min
the thickness of absorbing material necessary to reduce the x-ray intensity to half its original value
HVL
HVL are used into 2 different situations in determining ___ & ___
- Quality of x-ray beam
2. Barrier thickness
Energy is lost by which 3 methods
- Photoelectric effect ( most important to low energies)
- Compton scattering
- Pair production
Which method by which energy is loss is most important to low energies?
Photoelectric effect
