Question 1

What provides the most comprehensive approach to CT dose reduction?

Accepted Answer

A)  Longitudinal tube current module 
B)  Angular tube current module 
C)  Angular-longitudinal tube current module 
D)  Uniform TCM 
A)  Longitudinal tube current module 
B)  Angular tube current module 
C)  Angular-longitudinal tube current module 
D)  Uniform TCM

Question 2

Effective mAs can be described as:

Accepted Answer

A)  effective mAs = kilovolts/pitch. 
B)  effective mAs = true mAs + pitch. 
C)  effective mAs = true mAs/pitch. 
D)  effective mAs = pitch/kilovolts. 
A)  effective mAs = kilovolts/pitch. 
B)  effective mAs = true mAs + pitch. 
C)  effective mAs = true mAs/pitch. 
D)  effective mAs = pitch/kilovolts.

Question 3

What is the dose limit for radiation workers in the United States?

Accepted Answer

A)  20 mSv/year 
B)  50 mSv/year 
C)  75 mSv/year 
D)  100 mSv/year 
A)  20 mSv/year 
B)  50 mSv/year 
C)  75 mSv/year 
D)  100 mSv/year

Question 4

If the pitch increases, the dose:

Accepted Answer

A)  decreases. 
B)  increases. 
C)  stays the same. 
D)  pitch and dose are unrelated. 
A)  decreases. 
B)  increases. 
C)  stays the same. 
D)  pitch and dose are unrelated.

Question 5

What is a goal of automatic TCM?

Accepted Answer

A)  Increase scan speed 
B)  Improve patient comfort 
C)  Control dose to the patient 
D)  Measure patient size 
A)  Increase scan speed 
B)  Improve patient comfort 
C)  Control dose to the patient 
D)  Measure patient size

Question 6

Please match the following units of dose measurement. All answer selections will be used just once.

-Gray

Accepted Answer

A) Old unit of effective dose 
B) Conventional unit of exposure 
C) Old unit of absorbed dose 
D) SI unit of effective dose 
E) SI unit of absorbed dose 
A) Old unit of effective dose 
B) Conventional unit of exposure 
C) Old unit of absorbed dose 
D) SI unit of effective dose 
E) SI unit of absorbed dose

Question 7

What consideration does effective dose account and weigh?

Accepted Answer

A)  Patient size 
B)  Tissue radiosensitivities 
C)  Photon energy 
D)  Source distance 
A)  Patient size 
B)  Tissue radiosensitivities 
C)  Photon energy 
D)  Source distance

Question 8

Deterministic effects follow a:

Accepted Answer

A)  linear dose. 
B)  nonlinear dose. 
C)  threshold dose. 
D)  nonthreshold dose. 
A)  linear dose. 
B)  nonlinear dose. 
C)  threshold dose. 
D)  nonthreshold dose.

Question 9

Factors directly affecting CT dose cannot be controlled by the technologist.

Accepted Answer

A) True 
 B)False

Question 10

What is the unit of the CTDI?

Accepted Answer

A)  gray 
B)  Roentgen 
C)  rem 
D)  seivert 
A)  gray 
B)  Roentgen 
C)  rem 
D)  seivert

Question 11

Radiation protection principles include all of the following except:

Accepted Answer

A)  justification. 
B)  optimization. 
C)  dose limitation. 
D)  clarification. 
A)  justification. 
B)  optimization. 
C)  dose limitation. 
D)  clarification.

Question 12

What is used to measure exposure?

Accepted Answer

A)  Geiger counter 
B)  Ionization chamber 
C)  Detector chamber 
D)  Scintillation detector 
A)  Geiger counter 
B)  Ionization chamber 
C)  Detector chamber 
D)  Scintillation detector

Question 13

Which of the following factors of dose cannot be controlled by the technologist?

Accepted Answer

A)  Technique factors 
B)  X-ray beam collimation 
C)  Filtration 
D)  Patient centering 
A)  Technique factors 
B)  X-ray beam collimation 
C)  Filtration 
D)  Patient centering

Question 14

The method suggested by the Center for Devices and Radiological Health for CT dose measurement is the pencil ionization chamber.

Accepted Answer

A) True 
 B)False

Question 15

Each of the following are radiation bioeffect classifications except:

Accepted Answer

A)  stochastic. 
B)  nonstochastic. 
C)  coulombs. 
D)  deterministic. 
A)  stochastic. 
B)  nonstochastic. 
C)  coulombs. 
D)  deterministic.

Question 16

Shielding is a radiation protection action specially designed to only protect the patient.

Accepted Answer

A) True 
 B)False

Question 17

Please match the following units of dose measurement. All answer selections will be used just once.

-Roentgen

Accepted Answer

A) Old unit of effective dose 
B) Conventional unit of exposure 
C) Old unit of absorbed dose 
D) SI unit of effective dose 
E) SI unit of absorbed dose 
A) Old unit of effective dose 
B) Conventional unit of exposure 
C) Old unit of absorbed dose 
D) SI unit of effective dose 
E) SI unit of absorbed dose

Question 18

Which of the following are recommended by the CDRH as CT dose descriptors?

Accepted Answer

A)  Multiple-scan average dose (MSA
D)  
B)  Dose profile 
C)  Single-scan peak dose 
D)  Nonthreshold dose 
A)  Multiple-scan average dose (MSA
D)  
B)  Dose profile 
C)  Single-scan peak dose 
D)  Nonthreshold dose

Question 19

Examples of stochastic effects include each of the following except:

Accepted Answer

A)  cancer. 
B)  leukemia. 
C)  hereditary effects. 
D)  cataracts. 
A)  cancer. 
B)  leukemia. 
C)  hereditary effects. 
D)  cataracts.

Question 20

The CTDI was developed by the U.S. Food and Drug Administration.

Accepted Answer

A) True 
 B)False

What provides the most comprehensive approach to CT dose reduction?

Effective mAs can be described as:

What is the dose limit for radiation workers in the United States?

If the pitch increases, the dose:

What is a goal of automatic TCM?

Please match the following units of dose measurement. All answer selections will be used just once. -Gray

What consideration does effective dose account and weigh?

Deterministic effects follow a:

Factors directly affecting CT dose cannot be controlled by the technologist.

What is the unit of the CTDI?

Radiation protection principles include all of the following except:

What is used to measure exposure?

Which of the following factors of dose cannot be controlled by the technologist?

The method suggested by the Center for Devices and Radiological Health for CT dose measurement is the pencil ionization chamber.

Each of the following are radiation bioeffect classifications except:

Shielding is a radiation protection action specially designed to only protect the patient.

Please match the following units of dose measurement. All answer selections will be used just once. -Roentgen

Which of the following are recommended by the CDRH as CT dose descriptors?

Examples of stochastic effects include each of the following except:

The CTDI was developed by the U.S. Food and Drug Administration.

Computed Tomography: an Overview

Digital Image Processing

Physical Principles of Computed Tomography

Data Acquisition Concepts

Image Reconstruction

Iterative Reconstruction Basics

Basic Instrumentation

Image Postprocessing and Visualization Tools

Image Quality

Multislice Computed Tomography: Physical Principles and Instrumentation

Other Technical Applications of Computed Tomography Imaging: Basic Principles

Three-Dimensional Computed Tomography: Basic Concepts

Positron Emission Tomographyct Petct and Single-Photon Emission Computed Tomographyct Spectct Hybrid Scanners

Computed Tomography of the Head, Cerebral Vessels, Neck, and Spine

Computed Tomography of the Body

Pediatric Computed Tomography

Quality Control for Computed Tomography Scanners

Filters

Exam 10: Radiation Dose in Computed Tomography

What provides the most comprehensive approach to CT dose reduction?

Effective mAs can be described as:

What is the dose limit for radiation workers in the United States?

If the pitch increases, the dose:

What is a goal of automatic TCM?

Please match the following units of dose measurement. All answer selections will be used just once. -Gray

What consideration does effective dose account and weigh?

Deterministic effects follow a:

Factors directly affecting CT dose cannot be controlled by the technologist.

What is the unit of the CTDI?

Radiation protection principles include all of the following except:

What is used to measure exposure?

Which of the following factors of dose cannot be controlled by the technologist?

The method suggested by the Center for Devices and Radiological Health for CT dose measurement is the pencil ionization chamber.

Each of the following are radiation bioeffect classifications except:

Shielding is a radiation protection action specially designed to only protect the patient.

Please match the following units of dose measurement. All answer selections will be used just once. -Roentgen

Which of the following are recommended by the CDRH as CT dose descriptors?

Examples of stochastic effects include each of the following except:

The CTDI was developed by the U.S. Food and Drug Administration.

Computed Tomography: an Overview

Digital Image Processing

Physical Principles of Computed Tomography

Data Acquisition Concepts

Image Reconstruction

Iterative Reconstruction Basics

Basic Instrumentation

Image Postprocessing and Visualization Tools

Image Quality

Multislice Computed Tomography: Physical Principles and Instrumentation

Other Technical Applications of Computed Tomography Imaging: Basic Principles

Three-Dimensional Computed Tomography: Basic Concepts

Positron Emission Tomographyct Petct and Single-Photon Emission Computed Tomographyct Spectct Hybrid Scanners

Computed Tomography of the Head, Cerebral Vessels, Neck, and Spine

Computed Tomography of the Body

Pediatric Computed Tomography

Quality Control for Computed Tomography Scanners

Filters