Question 1

Health physics is concerned with minimizing radiation dose to _____.

Accepted Answer

A)  radiation physicists 
B)  radiation workers 
C)  the public 
D)  all of the above 
A)  radiation physicists 
B)  radiation workers 
C)  the public 
D)  all of the above D

Question 2

If a technologist is exposed to 4 mGyt/hr for 45 minutes during a fluoroscopy exam,what will be her total exposure?

Accepted Answer

A)  1 mGyt 
B)  2 mGyt 
C)  3 mGyt 
D)  4 mGyt 
A)  1 mGyt 
B)  2 mGyt 
C)  3 mGyt 
D)  4 mGyt C

Question 3

What is the best approach to occupational radiation exposure?

Accepted Answer

A)  Maintain the annual dose limits. 
B)  Follow the concept of ALARA. 
C)  Reduce your exposure to half the NCRP dose limits. 
D)  Wear protective apparel at all times. 
A)  Maintain the annual dose limits. 
B)  Follow the concept of ALARA. 
C)  Reduce your exposure to half the NCRP dose limits. 
D)  Wear protective apparel at all times. B

Question 4

The dose limit for the general public is _____ the dose limit for occupational exposure.

Accepted Answer

A)  1/10 
B)  1/5 
C)  1/2 
D)  3/4 
A)  1/10 
B)  1/5 
C)  1/2 
D)  3/4

Question 5

The NCRP makes _____ regarding dose limits.

Accepted Answer

A)  laws 
B)  recommendations 
C)  requirements 
D)  measurements 
A)  laws 
B)  recommendations 
C)  requirements 
D)  measurements

Question 6

The first radiation health physicists worked with _____.

Accepted Answer

A)  the atom bomb 
B)  x-ray tubes 
C)  CT scanners 
D)  nuclear medicine 
A)  the atom bomb 
B)  x-ray tubes 
C)  CT scanners 
D)  nuclear medicine

Question 7

The three cardinal principals of radiation protection involve _____.

Accepted Answer

A)  dose, shielding, and exposure 
B)  exposure, shielding, and ALARA 
C)  time, distance, and shielding 
D)  ALARA, time, and distance 
A)  dose, shielding, and exposure 
B)  exposure, shielding, and ALARA 
C)  time, distance, and shielding 
D)  ALARA, time, and distance

Question 8

The NCRP publishes annual dose limits for _____ exposure.

Accepted Answer

A)  public 
B)  occupational 
C)  prenatal 
D)  all of the above 
A)  public 
B)  occupational 
C)  prenatal 
D)  all of the above

Question 9

If a technologist is receiving 2 mGyt/hr standing 1 foot from the patient during fluoroscopy,what is his rate of exposure when he steps back to a distance of 2 feet from the patient?

Accepted Answer

A)  0.50 mGyt/hr 
B)  0.74 mGyt/hr 
C)  1 mGyt/hr 
D)  1.75 mGyt/hr 
A)  0.50 mGyt/hr 
B)  0.74 mGyt/hr 
C)  1 mGyt/hr 
D)  1.75 mGyt/hr

Question 10

Dose limits are based on a _____ dose-response relationship to radiation.

Accepted Answer

A)  nonlinear, nonthreshold 
B)  linear, nonthreshold 
C)  linear, threshold 
D)  nonlinear, threshold 
A)  nonlinear, nonthreshold 
B)  linear, nonthreshold 
C)  linear, threshold 
D)  nonlinear, threshold

Question 11

The dose limits established by the NCRP are derived from _____.

Accepted Answer

A)  government laws 
B)  newspaper articles 
C)  NCRP research 
D)  BEIR and NSC reports 
A)  government laws 
B)  newspaper articles 
C)  NCRP research 
D)  BEIR and NSC reports

Question 12

The concept of effective dose accounts for the _____.

Accepted Answer

A)  different types of radiation and RBE 
B)  relative radiosensitivity of various tissues and organs 
C)  the person's distance from the source 
D)  both A and B 
A)  different types of radiation and RBE 
B)  relative radiosensitivity of various tissues and organs 
C)  the person's distance from the source 
D)  both A and B

Question 13

Exposure is measured by multiplying _____ by _____.

Accepted Answer

A)  shielding thickness, exposure time 
B)  exposure rate, exposure time 
C)  exposure rate, shielding thickness 
D)  exposure time, distance 
A)  shielding thickness, exposure time 
B)  exposure rate, exposure time 
C)  exposure rate, shielding thickness 
D)  exposure time, distance

Question 14

If the HVL in a radiology department is 0.25 mm Pb,then how thick should a shield be to reduce the technologists' exposure to one fourth the incident scatter?

Accepted Answer

A)  0.125 mm Pb 
B)  0.25 mm Pb 
C)  0.5 mm Pb 
D)  1.0 mm Pb 
A)  0.125 mm Pb 
B)  0.25 mm Pb 
C)  0.5 mm Pb 
D)  1.0 mm Pb

Question 15

When using the inverse square law during fluoroscopy,the patient should be considered a(n)_____ source of radiation.

Accepted Answer

A)  area 
B)  linear 
C)  round 
D)  point 
A)  area 
B)  linear 
C)  round 
D)  point

Question 16

What is the NCRP?

Accepted Answer

A)  National Council of Radiation Protection 
B)  National Council of Radiology Personnel 
C)  National Committee on Radiation Prevention 
D)  National Committee on Random Particles 
A)  National Council of Radiation Protection 
B)  National Council of Radiology Personnel 
C)  National Committee on Radiation Prevention 
D)  National Committee on Random Particles

Question 17

A tenth-value layer is equal to _____ half-value layers.

Accepted Answer

A)  1.2 
B)  3.3 
C)  5.5 
D)  10.0 
A)  1.2 
B)  3.3 
C)  5.5 
D)  10.0

Exam 35: Health Physics

Health physics is concerned with minimizing radiation dose to _____.

If a technologist is exposed to 4 mGyt/hr for 45 minutes during a fluoroscopy exam,what will be her total exposure?

What is the best approach to occupational radiation exposure?

The dose limit for the general public is _____ the dose limit for occupational exposure.

The NCRP makes _____ regarding dose limits.

The first radiation health physicists worked with _____.

The three cardinal principals of radiation protection involve _____.

The NCRP publishes annual dose limits for _____ exposure.

If a technologist is receiving 2 mGyt/hr standing 1 foot from the patient during fluoroscopy,what is his rate of exposure when he steps back to a distance of 2 feet from the patient?

Dose limits are based on a _____ dose-response relationship to radiation.

The dose limits established by the NCRP are derived from _____.

The concept of effective dose accounts for the _____.

Exposure is measured by multiplying _____ by _____.

If the HVL in a radiology department is 0.25 mm Pb,then how thick should a shield be to reduce the technologists' exposure to one fourth the incident scatter?

When using the inverse square law during fluoroscopy,the patient should be considered a(n)_____ source of radiation.

What is the NCRP?

A tenth-value layer is equal to _____ half-value layers.

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

Designing for Radiation Protection

Patient Radiation Dose Management

Occupational Radiation Dose Management

Filters

If a technologist is exposed to 4 mGy_t/hr for 45 minutes during a fluoroscopy exam,what will be her total exposure?

If a technologist is receiving 2 mGy_t/hr standing 1 foot from the patient during fluoroscopy,what is his rate of exposure when he steps back to a distance of 2 feet from the patient?

Exposure is measured by multiplying _ by _.