Question 1

Positive beam limitation must be accurate to within _____% of the SID.

Accepted Answer

A)  10 
B)  5 
C)  2 
D)  1 
A)  10 
B)  5 
C)  2 
D)  1 C

Question 2

A cumulative timer is designed to _____ of fluoroscopy beam-on time.

Accepted Answer

A)  make the radiologist aware 
B)  turn off the radiation every 5 minutes 
C)  prevent more than 10 minutes 
D)  shut down the system after 15 minutes 
A)  make the radiologist aware 
B)  turn off the radiation every 5 minutes 
C)  prevent more than 10 minutes 
D)  shut down the system after 15 minutes A

Question 3

The collimator light must be accurate to within _____% of the SID.

Accepted Answer

A)  10 
B)  5 
C)  2 
D)  1 
A)  10 
B)  5 
C)  2 
D)  1 C

Question 4

What is the minimum requirement for filtration on x-ray equipment operating above 70 kVp?

Accepted Answer

A)  1.5 mm Al equivalent 
B)  2.0 mm Al equivalent 
C)  2.5 mm Al equivalent 
D)  3.5 mm Al equivalent 
A)  1.5 mm Al equivalent 
B)  2.0 mm Al equivalent 
C)  2.5 mm Al equivalent 
D)  3.5 mm Al equivalent

Question 5

A secondary barrier is designed to absorb _____ radiation

Accepted Answer

A)  leakage 
B)  scattered 
C)  primary 
D)  both A and B 
A)  leakage 
B)  scattered 
C)  primary 
D)  both A and B

Question 6

The intensity of scatter radiation 1 meter from the patient is approximately _____ of the intensity of the incident beam at the patient.

Accepted Answer

A)  0.01% 
B)  0.1% 
C)  10% 
D)  50% 
A)  0.01% 
B)  0.1% 
C)  10% 
D)  50%

Question 7

The _____ is the primary protective barrier for the fluoroscopic x-ray tube.

Accepted Answer

A)  ceiling 
B)  floor 
C)  image intensifier 
D)  table top 
A)  ceiling 
B)  floor 
C)  image intensifier 
D)  table top

Question 8

The leakage radiation limit for x-ray tubes is less than _____ mGy/hr at 1 meter from the tube housing.

Accepted Answer

A)  0.50 
B)  1 
C)  2 
D)  3 
A)  0.50 
B)  1 
C)  2 
D)  3

Question 9

The output intensities of reproduced exposures should not vary more than _____% from each other.

Accepted Answer

A)  5 
B)  10 
C)  15 
D)  20 
A)  5 
B)  10 
C)  15 
D)  20

Question 10

A Geiger-Muller counter is a(n)_____.

Accepted Answer

A)  scintillation detector 
B)  optically stimulated dosimeter 
C)  gas-filled detector 
D)  thermoluminescent dosimeter 
A)  scintillation detector 
B)  optically stimulated dosimeter 
C)  gas-filled detector 
D)  thermoluminescent dosimeter

Question 11

At the level of the tabletop,the intensity of the fluoroscopic beam should not exceed _____ for each mA of operation at 80 kVp.

Accepted Answer

A)  .02 mGy/hr 
B)  0.2 mGy/hr 
C)  21 mGy/min 
D)  0.21 mGy/min 
A)  .02 mGy/hr 
B)  0.2 mGy/hr 
C)  21 mGy/min 
D)  0.21 mGy/min

Question 12

A fluoroscopy system with automatic collimation must provide an unexposed border around the image at _____ above the table top.

Accepted Answer

A)  all heights 
B)  35 cm 
C)  25 cm 
D)  18 cm 
A)  all heights 
B)  35 cm 
C)  25 cm 
D)  18 cm

Question 13

The source-to-skin distance must be no less than _____ cm on stationary fluoroscopes.

Accepted Answer

A)  30 
B)  38 
C)  42 
D)  48 
A)  30 
B)  38 
C)  42 
D)  48

Question 14

The _____ is used for precise calibration of the output intensity of diagnostic x-ray tubes.

Accepted Answer

A)  G-M counter 
B)  ion chamber 
C)  scintillation detector 
D)  proportional counter 
A)  G-M counter 
B)  ion chamber 
C)  scintillation detector 
D)  proportional counter

Question 15

The x-ray control panel must show _____.

Accepted Answer

A)  beam on time 
B)  mAs used 
C)  positive beam limitation 
D)  automatic exposure controls 
A)  beam on time 
B)  mAs used 
C)  positive beam limitation 
D)  automatic exposure controls

Question 16

The fluoroscopic exposure control switch is always a(n)_____ type.

Accepted Answer

A)  rheostat 
B)  automatic 
C)  deadman 
D)  on-off 
A)  rheostat 
B)  automatic 
C)  deadman 
D)  on-off

Question 17

Gas-filled radiation detectors are based on the _____.

Accepted Answer

A)  thermoluminescence of crystals 
B)  photoemission of electrons 
C)  ionization of gas 
D)  scintillation of phosphors 
A)  thermoluminescence of crystals 
B)  photoemission of electrons 
C)  ionization of gas 
D)  scintillation of phosphors

Question 18

Primary radiation is _____.

Accepted Answer

A)  leakage radiation 
B)  the scattered beam 
C)  the useful beam 
D)  all of the above 
A)  leakage radiation 
B)  the scattered beam 
C)  the useful beam 
D)  all of the above

Question 19

The advantage(s)of using thermoluminescent dosimeters is/are:
I. small size
II. immediate results
III. tissue equivalent response

Accepted Answer

A)  I & II. 
B)  II only 
C)  II & III 
D)  I & III 
A)  I & II. 
B)  II only 
C)  II & III 
D)  I & III

Question 20

The design of an uncontrolled area in radiology is based on the NCRP recommended limit of _____ mGy/yr for the public.

Accepted Answer

A)  50 
B)  10 
C)  1 
D)  0.5 
A)  50 
B)  10 
C)  1 
D)  0.5

Exam 36: Designing for Radiation Protection

Positive beam limitation must be accurate to within _____% of the SID.

A cumulative timer is designed to _____ of fluoroscopy beam-on time.

The collimator light must be accurate to within _____% of the SID.

What is the minimum requirement for filtration on x-ray equipment operating above 70 kVp?

A secondary barrier is designed to absorb _____ radiation

The intensity of scatter radiation 1 meter from the patient is approximately _____ of the intensity of the incident beam at the patient.

The _____ is the primary protective barrier for the fluoroscopic x-ray tube.

The leakage radiation limit for x-ray tubes is less than _____ mGy/hr at 1 meter from the tube housing.

The output intensities of reproduced exposures should not vary more than _____% from each other.

A Geiger-Muller counter is a(n)_____.

At the level of the tabletop,the intensity of the fluoroscopic beam should not exceed _____ for each mA of operation at 80 kVp.

A fluoroscopy system with automatic collimation must provide an unexposed border around the image at _____ above the table top.

The source-to-skin distance must be no less than _____ cm on stationary fluoroscopes.

The _____ is used for precise calibration of the output intensity of diagnostic x-ray tubes.

The x-ray control panel must show _____.

The fluoroscopic exposure control switch is always a(n)_____ type.

Gas-filled radiation detectors are based on the _____.

Primary radiation is _____.

The advantage(s)of using thermoluminescent dosimeters is/are: I. small size II. immediate results III. tissue equivalent response

The design of an uncontrolled area in radiology is based on the NCRP recommended limit of _____ mGy/yr for the public.

Essential Concepts of Radiologic Science

The Structure of Matter

Electromagnetic Energy

Electricity, Magnetism, and Electromagnetism

The X-ray Imaging System

The X-ray Tube

X-ray Production

X-ray Emission

X-ray Interaction with Matter

Concepts of Radiographic Image Quality

Control of Scatter Radiation

Screen-Film Radiography

Screen-Film Radiographic Technique

Computers in Medical Imaging

Computed Radiography

Digital Radiography

Digital Radiographic Technique

Viewing the Digital Radiographic Image

Screen-Film Radiographic Artifacts

Screen-Film Radiographic Quality Control

Digital Radiographic Artifacts

Digital Radiographic Quality Control

Mammography

Mammography Quality Control

Fluoroscopy

Digital Fluoroscopy

Interventional Radiography

Computed Tomography

Human Biology

Fundamental Principles of Radiobiology

Molecular Radiobiology

Cellular Radiobiology

Deterministic Effects of Radiation

Stochastic Effects of Radiation

Health Physics

Patient Radiation Dose Management

Occupational Radiation Dose Management

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