rad review

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

Silver halide 



 
Sodium thiosulfate 


Lithium fluoride 


Aluminum oxide

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

What is the annual TEDE limit for radiation workers?



A
 
5 mSv 


B
 
500 mSv 


C
 
5,000 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

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

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

The dose-equivalent limit for the lens of the eye is 15 rem (____ mSv). 

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

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

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%

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

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

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

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

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.

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.

Which of the following will increase patient dose during fluoroscopy?

1. Decreasing the SSD


2. Using 2.5 mm Al filtration


3. 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

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

Which of the following safeguards is (are) taken to prevent inadvertent irradiation in early pregnancy?

1. Patient postings


2. Patient questionnaire


3. Elective booking

A
 
1 and 2 only 


B
 
1 and 3 only 


C
 
2 and 3 only 


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