Question 1

Radiation protection principles include: 
I. justification
II. optimization
III. dose limitation

Accepted Answer

A) I and II 
B) II and III 
C) I and III 
D) I, II, and III 
A) I and II 
B) II and III 
C) I and III 
D) I, II, and III D

Question 2

What is used to quantify the risk from partial body exposure to that from an equivalent whole body dose?

Accepted Answer

A) quantity effective dose 
B) quantity absorbed dose 
C) absorbed dose 
D) entrance dose 
A) quantity effective dose 
B) quantity absorbed dose 
C) absorbed dose 
D) entrance dose B

Question 3

The principle of _____________ refers to the reduction of the radiation dose while maintaining the required image quality needed for making a diagnosis.

Accepted Answer

A) ALARA 
B) collimation 
C) optimization 
D) shielding 
A) ALARA 
B) collimation 
C) optimization 
D) shielding C

Question 4

Match the following units of dose measurement. All answer selections will be used just once.
-rad

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 5

What is the process by which additional rotations before and after the planned length are taken? I. overranging
II. doubling scan
III. z-overscanning

Accepted Answer

A) I and II 
B) II and III 
C) I and III 
D) I, II, and III 
A) I and II 
B) II and III 
C) I and III 
D) I, II, and III

Question 6

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 7

What was the first dose descriptor to be identified?

Accepted Answer

A) dose profile 
B) computed tomography dose index 
C) multiple-scan average dose 
D) multiscan peak dose 
A) dose profile 
B) computed tomography dose index 
C) multiple-scan average dose 
D) multiscan peak dose

Question 8

What technical factor determines the penetrating power of the photons coming from the x-ray tube?

Accepted Answer

A) kVp 
B) mA 
C) seconds 
D) mAs 
A) kVp 
B) mA 
C) seconds 
D) mAs

Question 9

The old unit of effective dose was the rad.

Accepted Answer

A) True 
 B)False

Question 10

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 11

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 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

Factors directly affecting computed tomography dose cannot be controlled by the technologist.

Accepted Answer

A) True 
 B)False

Question 14

What is/are the unit(s) of exposure? 
I. Roentgen (R)
II. Sievert (Sv)
III. coulomb per kilogram (C/kg)

Accepted Answer

A) I and II 
B) II and III 
C) I and III 
D) I, II, and III 
A) I and II 
B) II and III 
C) I and III 
D) I, II, and III

Question 15

Examples of deterministic effects include: 
I. skin erythema
II. epilation
III. cataracts

Accepted Answer

A) I and II 
B) II and III 
C) I and III 
D) I, II, and III 
A) I and II 
B) II and III 
C) I and III 
D) I, II, and III

Question 16

The dose-length product is directly proportional to the scan length.

Accepted Answer

A) True 
 B)False

Question 17

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 18

What dose descriptor is used to describe a measurement of the total amount of exposure for a series of scans?

Accepted Answer

A) computed tomography dose index volume 
B) dose-length product 
C) multiple-scan average dose 
D) single-scan peak dose 
A) computed tomography dose index volume 
B) dose-length product 
C) multiple-scan average dose 
D) single-scan peak dose

Question 19

What is the unit of the computed tomography dose index?

Accepted Answer

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

Question 20

What provides the most comprehensive approach to computed tomography dose reduction?

Accepted Answer

A) longitudinal tube current module 
B) angular tube current module 
C) angular-longitudinal tube current module 
D) uniform tube current modulation 
A) longitudinal tube current module 
B) angular tube current module 
C) angular-longitudinal tube current module 
D) uniform tube current modulation

Radiation protection principles include: I. justification II. optimization III. dose limitation

What is used to quantify the risk from partial body exposure to that from an equivalent whole body dose?

The principle of _____________ refers to the reduction of the radiation dose while maintaining the required image quality needed for making a diagnosis.

Match the following units of dose measurement. All answer selections will be used just once. -rad

What is the process by which additional rotations before and after the planned length are taken? I. overranging II. doubling scan III. z-overscanning

Deterministic effects follow a:

What was the first dose descriptor to be identified?

What technical factor determines the penetrating power of the photons coming from the x-ray tube?

The old unit of effective dose was the rad.

Effective mAs can be described as:

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

What is used to measure exposure?

Factors directly affecting computed tomography dose cannot be controlled by the technologist.

What is/are the unit(s) of exposure? I. Roentgen (R) II. Sievert (Sv) III. coulomb per kilogram (C/kg)

Examples of deterministic effects include: I. skin erythema II. epilation III. cataracts

The dose-length product is directly proportional to the scan length.

Match the following units of dose measurement. All answer selections will be used just once. -gray

What dose descriptor is used to describe a measurement of the total amount of exposure for a series of scans?

What is the unit of the computed tomography dose index?

What provides the most comprehensive approach to computed tomography dose reduction?

Computed Tomography: An Overview

Introduction to Computers

Digital Image Processing

Physical Principles of Computed Tomography

Data Acquisition Concepts

Image Reconstruction

Basic Instrumentation

Image Postprocessing and Visualization Tools

Image Quality

Single-Slice Spiralhelical Computed Tomography: Physical Principles and Instrumentation

Multislice Spiralhelical Computed Tomography: Physical Principles and Instrumentation

Other Technical Applications of Computed Tomography Imaging: Basic Principles

Three-Dimensional Computed Tomography: Basic Concepts

Virtual Reality Imaging

Positron Emission Tomographycomputed Tomography 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

Radiation protection principles include: I. justification II. optimization III. dose limitation

What is used to quantify the risk from partial body exposure to that from an equivalent whole body dose?

The principle of _____________ refers to the reduction of the radiation dose while maintaining the required image quality needed for making a diagnosis.

Match the following units of dose measurement. All answer selections will be used just once. -rad

What is the process by which additional rotations before and after the planned length are taken? I. overranging II. doubling scan III. z-overscanning

Deterministic effects follow a:

What was the first dose descriptor to be identified?

What technical factor determines the penetrating power of the photons coming from the x-ray tube?

The old unit of effective dose was the rad.

Effective mAs can be described as:

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

What is used to measure exposure?

Factors directly affecting computed tomography dose cannot be controlled by the technologist.

What is/are the unit(s) of exposure? I. Roentgen (R) II. Sievert (Sv) III. coulomb per kilogram (C/kg)

Examples of deterministic effects include: I. skin erythema II. epilation III. cataracts

The dose-length product is directly proportional to the scan length.

Match the following units of dose measurement. All answer selections will be used just once. -gray

What dose descriptor is used to describe a measurement of the total amount of exposure for a series of scans?

What is the unit of the computed tomography dose index?

What provides the most comprehensive approach to computed tomography dose reduction?

Computed Tomography: An Overview

Introduction to Computers

Digital Image Processing

Physical Principles of Computed Tomography

Data Acquisition Concepts

Image Reconstruction

Basic Instrumentation

Image Postprocessing and Visualization Tools

Image Quality

Single-Slice Spiralhelical Computed Tomography: Physical Principles and Instrumentation

Multislice Spiralhelical Computed Tomography: Physical Principles and Instrumentation

Other Technical Applications of Computed Tomography Imaging: Basic Principles

Three-Dimensional Computed Tomography: Basic Concepts

Virtual Reality Imaging

Positron Emission Tomographycomputed Tomography 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