-
If the exposure rate to a body standing 5 feet from a radiation source is 10 mR/min, what will be the dose to that body at a distance of 8 feet from the source?
A
25.6 mR/min
B
16 mR/min
C
6.25 mR/min
-
- D
-
- 3.9 mR/min
-
Silver halide
Sodium thiosulfate
Lithium fluoride
Aluminum oxide
Lithium fluoride
-
What is the established annual occupational dose-equivalent limit for the lens of the eye?
A
10 mSv
B
50 mSv
C
150 mSv
D
250 mSv
-
- C
-
- 150 mSv
-
What is the annual TEDE limit for radiation workers?
A
5 mSv
B
500 mSv
C
5,000 mSv
D
50 mSv
-
- D
-
- 50 mSv
-
Which of the following personnel monitoring devices used in diagnostic radiography is considered to be the most sensitive and accurate?
A
TLD
B
Film badge
C
OSL dosimeter
D
Pocket dosimeter
-
- C
-
- OSL dosimeter
-
What is the established fetal dose-limit guideline for pregnant radiographers during the entire gestation period?
A
0.1 rem
B
0.5 rem
C
5.0 rem
D
10 rem
-
- B
-
- 0.5 rem
-
What is the annual dose-equivalent limit for the skin and hands of an occupationally exposed individual?
A
5 rem
B
25 rem
C
50 rem
D
100 rem
-
- C
-
- 50 rem
-
The dose-equivalent limit for the lens of the eye is 15 rem (____ mSv).
150
-
An optically stimulated luminescence dosimeter contains which of the following detectors?
A
Gadolinium
B
Aluminum oxide
C
Lithium fluoride
D
Photographic film
-
The term effective dose refers to
A
whole-body dose
B
localized organ dose
C
genetic effects
D
somatic and genetic effects
-
- A
-
- whole-body dose
-
According to the National Council on Radiation Protection and Measurements (NCRP), the gestational dose-equivalent limit for embryo/fetus of a pregnant radiographer is
A
1 mSv
B
0.5 mSv
C
15 mSv
D
50 mSv
-
- B
-
- 0.5 mSv
-
How much protection is provided from a 100-kVp x-ray beam when using a 0.50-mm lead-equivalent apron?
A
40%
B
75%
C
88%
D
99%
-
- B
-
- 75%
-
The National Council on Radiation Protection and Measurements (NCRP) has recommended what total equivalent dose limit to the embryo/fetus?
A
0.5 mSv
B
5.0 mSv
C
50 mSv
D
500 mSv
-
- B
-
- 5.0 mSv
-
What is the established fetal dose-limit guideline for pregnant radiographers during the entire gestation period?
A
0.1 rem
B
0.5 rem
C
5.0 rem
D
10 rem
-
- B
-
- 0.5 rem
-
What is the annual dose-equivalent limit for the skin and hands of an occupationally exposed individual?
A
5 rem
B
25 rem
C
50 rem
D
100 rem
-
- C
-
- 50 rem
-
According to the National Council on Radiation Protection and Measurements (NCRP), the gestational dose-equivalent limit for embryo/fetus of a pregnant radiographer is
A
1 mSv
B
0.5 mSv
C
15 mSv
D
50 mSv
-
- B
-
- 0.5 mSv
-
When the collimated field must extend past the edge of the body, allowing primary radiation to strike the tabletop, as in a lateral lumbar spine radiograph, what may be done to prevent excessive radiographic density owing to undercutting?
A
Reduce the milliampere-seconds.
B
Reduce the kilovoltage.
C
Use a shorter SID.
D
Use lead rubber to absorb tabletop primary radiation.
-
- D
-
- Use lead rubber to absorb tabletop primary radiation.
-
If the exposure rate to an individual standing 4.0 m from a source of radiation is 10 mR/h, what will be the dose received after 20 minutes at a distance of 6 m from the source?
A
22.5 mR
B
7.5 mR
C
4.44 mR
D
1.48 mR
-
With milliamperes (mA) increased to maintain output intensity, how is the ESE affected as the source-to-skin distance (SSD) is increased?
A
The ESE increases.
B
The ESE decreases.
C
The ESE remains unchanged.
D
ESE is unrelated to SSD.
-
- B
-
- The ESE decreases.
-
Which of the following will increase patient dose during fluoroscopy?
- Decreasing the SSD
- Using 2.5 mm Al filtration
- Restricting tabletop intensity to less than 10 R/min
A
1 only
B
1 and 2 only
C
2 and 3 only
D
1, 2, and 3
-
- A
-
- 1 only
-
If a patient received 2000 mrad during a 10-minute fluoroscopic examination, what was the dose rate?
A
0.02 rad/min
B
0.2 rad/min
C
2.0 rad/min
D
20 rad/min
-
- B
-
- 0.2 rad/min Two thousand mrad is equal to 2 rad. If 2 rad were delivered in 10 minutes, then the dose rate is 2 ÷ 10, or 0.2 rad/min.
-
Which of the following safeguards is (are) taken to prevent inadvertent irradiation in early pregnancy?
- Patient postings
- Patient questionnaire
- Elective booking
A
1 and 2 only
B
1 and 3 only
C
2 and 3 only
D
1, 2, and 3
-
- D
-
- 1, 2, and 3
-
If a patient received 1,400 mrad during a 7-minute fluoroscopic examination, what was the dose rate?
A
200 rad/min
B
5 rad/min
C
2.0 rad/min
D
0.2 rad/min
-
- D
-
- 0.2 rad/min
- A measure 1,400 mrad is equal to 1.4 rad. If 1.4 rad were delivered in 7 minutes, then the dose rate would be 0.2 rad/min:
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