QA and QC Study Guide Flashcards
What type of artifact would dirt in the light guide of a CR reader produce? In other words, how would it present on a radiograph?
white streaks
how many AEC detector cells are there?
3
for an EFS of 0.3 mm or smaller, what type of test is recommended by NEMA?
star test pattern
what is the accepted tolerance for the stated EFS and the measured EFS?
40-50%
QA deals with mostly:
the people and the services they provide
the exposure indicator is a measure of:
what is mA linearity?
ability of a system to produce constant radiation output for multiple combinations of mA and exposure times
what is the reproducibility test?
exposing the same technique 5-10 times and measuring the radiation output for each exposure
QC deals with:
monitoring and maintaining equipment and instrumentation of a system
what is the post processing function that blackens areas around an image to reduce eye strain?
What would contribute most to degradation of the SNR?
luminance response
Which organization has authority over the design and manufacture of x-ray equipment?
TQM
HVL is what type of test?
QC
what are the names of the two monitor test patterns?
SMPTE
AAPM TG18
what is the unit of measure for monitor luminace?
candela/square meter
What is the QC standard for ambient light in a reading room?
limit the amount of ambient light sources as much as possible
Which accrediting body requires effective QC/QA programs?
TJC/JCAHO
what is the emergency back up of PACS called?
archiving plan
what is the total embryonic/fetal dose allowed for a 9 month gestation?
5 mSv
what is the max annual dose limit for an occupational worker?
50 mSv
all protective lead apparel should be checked how often?
annually
how often should repeat analysis be performed?
monthly
erasure of plates should take place on a _______ basis.
daily
what is the tolerance between the light field and the actual collimation?
+ or - 2%
the AEC backup timer MUST terminate an exposure at?
6 secs or 600 mAs
what is the tolerance between the stated and actual kVp?
+ or - 5%
what is the tolerance between the stated and actual exposure time?
+ or - 5%
CQI focuses mainly on what?
improving the overall process
proper cleaning of imaging plates should be done on a _______ basis.
monthly
what is the average total radiation exposure to humans from natural sources?
3.6 mSv
what is the max annual dose limit for the eye lens?
150 mSv
what are the cardinal rules of radiation protection?
reduce time
max distance
max shielding
