If the operator stands behind a portable shield, which may allow
scattered radiation to pass around it's edges; total radiation dose
reduction would be approximately:
a.) 50%
b.) 75%
c.) 92%
d.) 99% - ANSWER-99%
Which of the following are SHORT TERM stepwise effects of radiation
exposure?
1.) life-span shortening
2.) primary radiochemical reactions
,3.) functional damage of cells
A.) 1 and 2
b.) 1 and 3
c.) 2 and 3
d.) 1, 2, and 3 - ANSWER-C. 2 and 3
Limited permit X-ray technicians are excluded from:
A.) taking plain radiographs of the extremities
B.) operating portable or mobile X-ray equipment
C.) taking plain radiographs of the chest
d.) all of the above - ANSWER-B.) operating portable or mobile X-ray
equipment
An example of a radiographic study using natural shielding to decrease
radiation to the ovaries is:
A.) AP T/S
b.) AP pelvis
c.) lateral femur
d.) PA lumbar spine - ANSWER-d.) PA Lumbar Spine
Which of the following is part of the x-ray tube anode?
Which electron interaction with the anode causes x-ray beam to be
polygenergetic?
A.) characteristic
b.) Compton
c.) pair production
d.) Bremsstrahlung - ANSWER-d.) Bremsstrahlung
What happens to the nominal focal spot size as the x-ray tube target
(anode) decreases?
A.) decreases
B.) stays the same
c.) increases
d.) inverts - ANSWER-a.) decreases
Which of the following will reduce patient radiation dose?
, a.) increased thickness of the alum. tabletop
b.) use more radio-absorbent cassette fronts
c.) use KEVLAR cassette fronts
d.) increase grid ratio - ANSWER-?? Look up see page?
What accounts for most of the repeated radiographs (retakes/repeats)
today?
a.) incorrect film storage
b.) incorrect selection of PRIMARY FACTORS
c.) lack of collimation
d.) incorrect film processing - ANSWER-b.) incorrect selection of
PRIMARY FACTORS
0.5 mm lead equivalent gonad shields placed over the ovaries/testes
reduce radiation dose to the gonads approximately ______%
a.) 55%
b.) 80%
c.) 92%
d.) 100% - ANSWER-c.) 92% (verify)
Under which of the following conditions much gonads be shielded?
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