Chapter 8 – Protecting Occupationally Exposed Radiologic Personnel

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Chapter 8 – Protecting Occupationally
D. Increases 100 times
Exposed Radiologic Personnel
5. Which of the following adjustments in technical
1. Which of the following imaging procedures increase
the radiographer's risk of exposure?
1. C-arm fluoroscopy
2. Interventional procedures that employ high-level-
exposure factors decrease the production of scattered
radiation?
A. Decrease kVp and increase mAs in
compensation
B. Decrease kVp and decrease mAs
control fluoroscopy
3. Mobile examinations
A. 1 and 2 only
B. 1 and 3 only
C. 2 and 3 only
D. 1, 2, and 3
2. Because occupational exposure of the radiographer
can be kept as low as reasonably achievable (ALARA)
through individual monitoring and other protective
measures and devices and because exposure from
radiation-related jobs will not alter the
______________________, radiation workers may
C. Increase kVp and decrease mAs in
compensation
D. Increase kVp and increase mAs
6. During which of the following radiologic examinations
should a radiographer always wear a thyroid shield?
A. Fluoroscopy and special procedures
B. Routine mobile radiographic procedures
C. General diagnostic radiographic procedures
D. Computed tomographic procedures
receive a larger equivalent dose than members of the
general population.
A. Mean glandular dose
B. Genetically significant dose
C. Mean active bone marrow
D. Tissue tolerance dose
7. While standing behind the control-booth barrier, a
radiographer makes a radiographic exposure. The x-rays
scattered from the patient's body should
__________________.
A. Not have enough remaining energy to reach the
control-booth barrier
3. In terms of occupational risk, radiography may be
compared with the occupational risk associated with
which of the following?
A. Extremely hazardous industries
B. Other industries considered reasonably safe,
such as government or trade
B. Scatter only once before reaching any area
behind the control-booth barrier
C. Scatter a minimum of 2 times before reaching
any area behind the control-booth barrier
D. Scatter a minimum of 10 times before reaching
any area behind the control-booth barrier
C. A nuclear war
D. A radiation accident such as the Chernobyl
nuclear power disaster
8. Which of the following is another term for use factor
(U)?
A. Workload factor
4. Whenever scattered radiation decreases, the
radiographer's exposure ___________.
A. Decreases
B. Increases slightly
B. Occupancy factor in controlled and uncontrolled
areas
C. Beam direction factor
D. Protective barrier thickness consideration factor
C. Remains the same
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9. The annual effective dose limit allowed for individual
B. 100 microsievert (10 mrem)
members of the general public not occupationally
C. 20 microsievert (2 mrem)
exposed is __________ for continuous or frequent
D. 2 microsievert (0.2 mrem)
exposures from artificial sources other then medical
irradiation and natural background and _________ for
14. When a radiologic technologist tells her employer that
infrequent annual exposure.
she is pregnant, which of the following is likely?
A. 1 mSv (0.1 rem), 5 mSv (0.5 rem)
B. 3 mSv (0.3 rem), 7 mSv (0.5 rem)
A. Her employer terminates her employment until
after her child is born
C. 5 mSv (0.5 rem), 9 mSv (0.9 rem)
B. She is able to continue her employment but is not
D. 50 mSv (5 rem), 25 mSv (2.5 rem)
permitted to perform any radiologic procedures during her
pregnancy
10. A protective curtain or sliding panel of a minimal
C. Her employer requires her to take a leave of
thickness of 0.25-mm lead equivalent should be
absence until after the completion of the first trimester of
positioned between the fluoroscopist and the patient to
the pregnancy and then return to her normal duties
intercept which of the following?
D. She continues to perform her duties without
A. Primary radiation
interruption of employment, provided that she has
B. Scattered radiation
received radiation safety counseling and follows
C. Remnant radiation
established radiation safety practices
D. Useful radiation
15. Which part(s) of a diagnostic x-ray unit should a
11. If the intensity of the x-ray beam is inversely
radiographer avoid touching while a radiographic
proportional to the square of the distance from the
exposure is in progress?
source, how does the intensity of the x-ray beam change
A. Control panel
when the distance from that source of radiation is tripled?
B. Exposure switch
A. It increases by a factor of 3 at the new distance
C. Kilovoltage control on the control panel only
B. It increases by a factor of 9 at the new distance
D. Tube housing, collimator, and high-tension
C. It decreases by a factor of 9 at the new distance
cables
D. It decreases by a factor of 3 at the new distance
16. When doors to radiographic and fluoroscopic rooms
12. What is the term for the proportional amount of time
are closed during radiation exposures, a substantial
during which the x-ray beam is energized or directed
degree of protection is provided for persons in areas
toward a particular barrier?
adjacent to the room door. This is because in most
A. Occupancy factor
facilities room doors have attenuation for diagnostic
B. Workload factor
energy x-ray equivalent to that provided by ________
C. Distance factor
inch of lead.
D. Use factor
A. 1/2
B. 1/4
13. The maximum weekly permitted equivalent dose for a
C. 1/16
controlled area must not exceed:
D. 1/32
A. 1000 microsievert (100 mrem)
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17. When the time spent in a higher-radiation area is
C. 0.35 mm
reduced or limited, occupational exposure:
D. 0.50 mm
A. Is also reduced
B
Is increased
22. _____________ is the radiation output weighted time
C. Remains the same
during the week that the x-ray unit is actually delivering
D. None of the above
radiation.
A. Control designation
18. Diagnostic imaging personnel receive the highest
B. Occupancy
occupational exposure during:
C. Use factor
1. Fluoroscopy
D. Workload
2. Mobile radiography
3. Special procedures
23. To ensure that the lifetime risk of occupationally
A. 1 only
exposed persons remains acceptable, the lifetime
B. 2 only
effective dose in mSv should not exceed:
C. 3 only
D. 1, 2, and 3
A. The occupationally exposed person's age in
years
B. 5 times the occupationally exposed person's age
19. If the peak energy of the x-ray beam is 100 kVp, a
protective lead apron must be the equivalent of which of
the following measures?
A. A 0.25-mm thickness of lead
B. A 0.5-mm thickness of lead
in years
C. 10 times the occupationally exposed person's
age in years
D. 20 times the occupationally exposed person's
age in years
C. A 1.0-mm thickness of lead
D. A 1.5-mm thickness of lead
24. Secondary radiation includes:
1. Leakage radiation
20. For C-arm devices with similar fields of view, the
2. Primary radiation
dose rate to personnel located within a meter of the
3. Scatter radiation
patient is:
A. 1 and 2 only
A. Comparable to that of routine fixed fluoroscopy
B. 1 and 3 only
B. Far greater than the dose rate of routine fixed
C. 2 and 3 only
fluoroscopy
D. 1, 2, and 3
C. Significantly less than the dose rate of routine
fluoroscopy
D. Comparable to that of high-level-control
fluoroscopy
25. Who should determine the exact shielding
requirements for a particular imaging facility?
A. Administrator of the facility
B. Qualified medical physicist
21. Protective eyeglasses with optically clear lenses
C. Radiologist
should contain a minimal lead equivalent protection of:
D. Radiographer
A. 0.15 mm
B. 0.25 mm
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Chapter 8.
1. D
15. D
2. B
16. D
3. B
17. A
4. A
18. D
5. C
19. A
6. A
20. A
7. C
21. C
8. C
22. D
9. A
23. C
10. B
24. B
11. C
25. B
12. D
13. A
14. D
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