Question 1

The tolerance limit for a computed tomography number calibration quality control test is:

Accepted Answer

A) ±3 computed tomography numbers 
B) ±5 computed tomography numbers 
C) ±8 computed tomography numbers 
D) no tolerance limit has been established 
A) ±3 computed tomography numbers 
B) ±5 computed tomography numbers 
C) ±8 computed tomography numbers 
D) no tolerance limit has been established A

Question 2

Quality control tests, test results, and interpretation of test results should be:

Accepted Answer

A) recorded in a quality control logbook 
B) recorded on pieces of paper 
C) recorded on the bulletin board beside the computed tomography scanner 
D) recorded in the positioning notebook of the technologist 
A) recorded in a quality control logbook 
B) recorded on pieces of paper 
C) recorded on the bulletin board beside the computed tomography scanner 
D) recorded in the positioning notebook of the technologist A

Question 3

Record keeping is not an important consideration in a quality control program.

Accepted Answer

A) True 
 B)False  False

Question 4

Water phantoms are not used for quality control tests.

Accepted Answer

A) True 
 B)False

Question 5

Quality control tests that are effective must be objective, quantitative, and easy and can be done very quickly.

Accepted Answer

A) True 
 B)False

Question 6

Quality control test results do not have to be interpreted as soon as the tests are completed.

Accepted Answer

A) True 
 B)False

Question 7

The following quality control tests should be done biannually except:

Accepted Answer

A) high-contrast resolution 
B) low-contrast resolution 
C) light field accuracy 
D) flatness of computed tomography number 
A) high-contrast resolution 
B) low-contrast resolution 
C) light field accuracy 
D) flatness of computed tomography number

Question 8

A measurement of a computed tomography scanner's performance to ensure the scanner is operating at an acceptable level describes:

Accepted Answer

A) quality administration 
B) quality assurance 
C) quality control 
D) quality maintenance 
A) quality administration 
B) quality assurance 
C) quality control 
D) quality maintenance

Question 9

Regulatory agencies do not require any standard of quality.

Accepted Answer

A) True 
 B)False

Question 10

All of the following are possible causes of failure for the standard deviation of the computed tomography number except:

Accepted Answer

A) electronic noise from amplifiers 
B) decreased dose 
C) electronic noise from the analog-to-digital converters 
D) miscalibration of the algorithm 
A) electronic noise from amplifiers 
B) decreased dose 
C) electronic noise from the analog-to-digital converters 
D) miscalibration of the algorithm

Question 11

A possible cause of failure for the high-contrast resolution quality control test is that of an enlarged focal spot in the x-ray tube.

Accepted Answer

A) True 
 B)False

Question 12

Computed tomography scanner manufacturers do not offer any information regarding quality control testing.

Accepted Answer

A) True 
 B)False

Question 13

The following quality control tests should be done annually except:

Accepted Answer

A) computed tomography number versus patient size 
B) hard copy output 
C) computed tomography number versus slice width 
D) standard deviation of computed tomography number in water 
A) computed tomography number versus patient size 
B) hard copy output 
C) computed tomography number versus slice width 
D) standard deviation of computed tomography number in water

Question 14

Quality control tests must be performed on a routine basis.

Accepted Answer

A) True 
 B)False

Question 15

Often a quality control program can result in reduced down time.

Accepted Answer

A) True 
 B)False

Question 16

Quality control tests can be performed by all of the following except:

Accepted Answer

A) technologists 
B) medical physicists 
C) quality control technicians 
D) department aides 
A) technologists 
B) medical physicists 
C) quality control technicians 
D) department aides

Question 17

In quality control, steps are taken to correct problems.

Accepted Answer

A) True 
 B)False

Question 18

The following are all basic tenets of a quality control program for computed tomography scanners except:

Accepted Answer

A) tests should be performed on a regular period basis 
B) prompt interpretation of the results 
C) faithful record keeping 
D) phantoms for quality control measurements must be stored in a controlled environment 
A) tests should be performed on a regular period basis 
B) prompt interpretation of the results 
C) faithful record keeping 
D) phantoms for quality control measurements must be stored in a controlled environment

Question 19

Which tests the performance of a computed tomography scanner on a number of parameters and compares the performance with a standard?

Accepted Answer

A) quality administration 
B) quality assurance 
C) quality control 
D) quality maintenance 
A) quality administration 
B) quality assurance 
C) quality control 
D) quality maintenance

Question 20

The average CT number of water QC test should be done:

Accepted Answer

A) daily 
B) weekly 
C) monthly 
D) annually 
A) daily 
B) weekly 
C) monthly 
D) annually

The tolerance limit for a computed tomography number calibration quality control test is:

Quality control tests, test results, and interpretation of test results should be:

Record keeping is not an important consideration in a quality control program.

Water phantoms are not used for quality control tests.

Quality control tests that are effective must be objective, quantitative, and easy and can be done very quickly.

Quality control test results do not have to be interpreted as soon as the tests are completed.

The following quality control tests should be done biannually except:

A measurement of a computed tomography scanner's performance to ensure the scanner is operating at an acceptable level describes:

Regulatory agencies do not require any standard of quality.

All of the following are possible causes of failure for the standard deviation of the computed tomography number except:

A possible cause of failure for the high-contrast resolution quality control test is that of an enlarged focal spot in the x-ray tube.

Computed tomography scanner manufacturers do not offer any information regarding quality control testing.

The following quality control tests should be done annually except:

Quality control tests must be performed on a routine basis.

Often a quality control program can result in reduced down time.

Quality control tests can be performed by all of the following except:

In quality control, steps are taken to correct problems.

The following are all basic tenets of a quality control program for computed tomography scanners except:

Which tests the performance of a computed tomography scanner on a number of parameters and compares the performance with a standard?

The average CT number of water QC test should be done:

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

Radiation Dose in Computed Tomography

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

Filters

Exam 20: Quality Control for Computed Tomography Scanners

The tolerance limit for a computed tomography number calibration quality control test is:

Quality control tests, test results, and interpretation of test results should be:

Record keeping is not an important consideration in a quality control program.

Water phantoms are not used for quality control tests.

Quality control tests that are effective must be objective, quantitative, and easy and can be done very quickly.

Quality control test results do not have to be interpreted as soon as the tests are completed.

The following quality control tests should be done biannually except:

A measurement of a computed tomography scanner's performance to ensure the scanner is operating at an acceptable level describes:

Regulatory agencies do not require any standard of quality.

All of the following are possible causes of failure for the standard deviation of the computed tomography number except:

A possible cause of failure for the high-contrast resolution quality control test is that of an enlarged focal spot in the x-ray tube.

Computed tomography scanner manufacturers do not offer any information regarding quality control testing.

The following quality control tests should be done annually except:

Quality control tests must be performed on a routine basis.

Often a quality control program can result in reduced down time.

Quality control tests can be performed by all of the following except:

In quality control, steps are taken to correct problems.

The following are all basic tenets of a quality control program for computed tomography scanners except:

Which tests the performance of a computed tomography scanner on a number of parameters and compares the performance with a standard?

The average CT number of water QC test should be done:

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

Radiation Dose in Computed Tomography

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

Filters