RADIATION PROTECTION IN MEDICAL IMAGING
©2013 ASRT. All rights reserved.
Radiation Protection in Medical Imaging: Test Bank
Radiation Protection in Medical Imaging
Test Bank
1. Which national organization sets construction specifications for radiography examination rooms?
a. National Council on Radiation Protection and Measurements (NCRP)
b. American College of Radiology (ACR)
c. American Registry of Radiologic Technologists (ARRT)
d. Nuclear Regulatory Commission (NRC)*
2. X-rays are used to produce medical images in all of the following modalities except:
a. nuclear medicine.*
b. computed tomography.
c. mammography.
d. fluoroscopy.
3. Scattered radiation that exhibits isotrophic characteristics is scattered:
a. at right angles to the primary beam.
b. 180 degrees to the central ray.
c. forward through the patient.
d. in any direction.*
4. What is the SI unit used to measure occupational dose?
a. gray
b. sievert*
c. roentgen equivalent man
d. becquerel
5. An atom that has gained or lost a neutron is called a(n):
a. negatron.
b. positron.
c. isotope.*
d. alpha particle.
6. Which of the following forms of radiation has the highest relative biological effectiveness (RBE)?
a. x-rays
b. alpha particles*
c. beta particles
d. gamma rays
7. Which of the following types of dosimeters releases its energy when exposed to a laser light and can
be read more than once?
a. optically stimulated luminescence (OSL)*
b. thermoluminescent (TLD)
c. film badge
d. ring badge
8. Where should a fetal dosimeter be worn?
a. at chest level outside the lead apron
b. at chest level beneath the lead apron
c. at waist level beneath the lead apron *
d. at waist level outside the lead apron
9. The annual whole-body dose limit for members of the general public is _____ mrem.
a. 5
b. 50
©2013 ASRT. All rights reserved.
Radiation Protection in Medical Imaging: Test Bank
c. 500 *
d. 5000
10. Whole-body radiation exposures that exceed _____ rad can cause chromosomal damage.
a. 5 *
b. 50
c. 500
d. 5000
11. Which of the following conditions has been linked to low-level radiation exposure?
a. autism
b. hypogonadism
c. cataracts*
d. sickle cell anemia
12. Any secondary barrier must be equivalent to _____ inch thickness of lead.
a. 1/32 *
b. 1/16
c. 1/4
d. 1/2
13. Mobile shields must contain a lead thickness equivalent of at least _____ mm.
a. 0.25
b. 0.5 *
c. 1.0
d. 1.2
14. Lead aprons must contain a lead thickness equivalent of at least _____ mm.
a. 0.25 *
b. 0.5
c. 1.0
d. 1.2
15. Which type of shield is most appropriate for a radiologic technologist to wear during a fluoroscopic
procedure?
a. mobile
b. body apron
c. wrap around*
d. inherent
16. Who should be the first choice to help a patient remain still if he or she struggles during a radiographic
procedure?
a. nurse
b. radiologic technologist
c. member of patient's family *
d. radiologist
17. Adhesive tape should not be used as an assistive device to help a patient remain still unless the
patient:
a. has Parkinson disease.
b. cannot hear directions.
c. consents to the use of tape.*
d. refuses to remain still.
©2013 ASRT. All rights reserved.
Radiation Protection in Medical Imaging: Test Bank
18. The minimum length that the exposure control cord should extend for portable radiography equipment
is _____ feet.
a. 3
b. 4
c. 6 *
d. 10
19. Fluoroscopy units are equipped with an alarm that sounds:
a. whenever the beam is active.
b. during nonpulsed fluoroscopy use.
c. after 5 minutes of fluoroscopy time.*
d. if the slot cover is not in place.
20. The best way for radiation therapists to protect themselves from radiation during a treatment is to:
a. wear a wraparound lead apron.
b. stand at least 6 feet from the patient.
c. stand behind a mobile shield.
d. leave the treatment room.*
©2013 ASRT. All rights reserved.
Radiation Protection in Medical Imaging: Test Bank