Question 1

When the slice thickness is equal to the pixel size, the data acquired are said to be:

Accepted Answer

A)  anisotropic. 
B)  distropic. 
C)  isotropic. 
D)  unitropic. 
A)  anisotropic. 
B)  distropic. 
C)  isotropic. 
D)  unitropic.

Question 2

All of the following terms are used to refer to MSCT except:

Accepted Answer

A)  multisection CT. 
B)  multidetector CT. 
C)  multichannel CT. 
D)  multisystem CT. 
A)  multisection CT. 
B)  multidetector CT. 
C)  multichannel CT. 
D)  multisystem CT.

Question 3

As the pitch increases, the image quality:

Accepted Answer

A)  increases. 
B)  decreases. 
C)  does not change. 
D)  has no direct relationship. 
A)  increases. 
B)  decreases. 
C)  does not change. 
D)  has no direct relationship.

Question 4

MSCT scanners utilize xenon gas detectors for their high X-ray absorption.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following describes when raw data for image reconstruction can be selected on the basis of the patient's electrocardiogram (ECG)?

Accepted Answer

A)  Cardiac reconstruction 
B)  Gated reconstruction 
C)  Motion reconstruction 
D)  Timed reconstruction 
A)  Cardiac reconstruction 
B)  Gated reconstruction 
C)  Motion reconstruction 
D)  Timed reconstruction

Question 6

Which of the following is not considered a cone-beam algorithm?

Accepted Answer

A)  Exact algorithms 
B)  Approximate algorithms 
C)  Opposed algorithms 
D)  Feldkamp-Davis-Kress (FDK) algorithm 
A)  Exact algorithms 
B)  Approximate algorithms 
C)  Opposed algorithms 
D)  Feldkamp-Davis-Kress (FDK) algorithm

Question 7

Dual-source CT (DSCT) scanners are primarily used for:

Accepted Answer

A)  cardiac imaging. 
B)  quantitative imaging. 
C)  pulmonary imaging. 
D)  virtual colonoscopy. 
A)  cardiac imaging. 
B)  quantitative imaging. 
C)  pulmonary imaging. 
D)  virtual colonoscopy.

Question 8

The pitch ratio is expressed as:

Accepted Answer

A)  distance the table travels during 360 degrees/slice thickness. 
B)  slice thickness/distance the table travels during 360 degrees. 
C)  slice thickness + distance the table travels during 360 degrees. 
D)  slice thickness *distance the table travels during 360 degrees. 
A)  distance the table travels during 360 degrees/slice thickness. 
B)  slice thickness/distance the table travels during 360 degrees. 
C)  slice thickness + distance the table travels during 360 degrees. 
D)  slice thickness *distance the table travels during 360 degrees.

Question 9

The overall goal of MSCT is to:

Accepted Answer

A)  improve volume coverage speed performance. 
B)  decrease patient dose. 
C)  improve spatial resolution. 
D)  increase tube memory. 
A)  improve volume coverage speed performance. 
B)  decrease patient dose. 
C)  improve spatial resolution. 
D)  increase tube memory.

Question 10

Slice-by-slice sequential CT creates inaccurate generation of 3D images resulting in partial voluming artifacts.

Accepted Answer

A) True 
 B)False

Question 11

What is defined as the distance (in millimeters) that the CT table moves during one revolution of the X-ray tube?

Accepted Answer

A)  Collimation 
B)  Table increment 
C)  Pitch 
D)  Couch movement 
A)  Collimation 
B)  Table increment 
C)  Pitch 
D)  Couch movement

Question 12

All of the following are advantages of MSCT except:

Accepted Answer

A)  increased speed and volume coverage. 
B)  improved spatial resolution. 
C)  reduction of radiation exposure. 
D)  decreased contrast resolution. 
A)  increased speed and volume coverage. 
B)  improved spatial resolution. 
C)  reduction of radiation exposure. 
D)  decreased contrast resolution.

Question 13

In 1992, the first modern multislice scanner was introduced by:

Accepted Answer

A)  Elscint. 
B)  GE Healthcare Systems. 
C)  Siemens Healthcare Systems. 
D)  Toshiba Healthcare Systems. 
A)  Elscint. 
B)  GE Healthcare Systems. 
C)  Siemens Healthcare Systems. 
D)  Toshiba Healthcare Systems.

Question 14

The ideal pitch in spiral/helical CT is 2:1.

Accepted Answer

A) True 
 B)False

Question 15

In MSCT, a _________ beam geometry results, rather than a fan beam as in SSCT scanners.

Accepted Answer

A)  circular 
B)  cone 
C)  rectangular 
D)  triangular 
A)  circular 
B)  cone 
C)  rectangular 
D)  triangular

Question 16

What type of detector is used in MSCT scanners?

Accepted Answer

A)  Helium gas detector 
B)  Solid-state scintillation detector 
C)  Tungsten detector 
D)  Xenon gas detector 
A)  Helium gas detector 
B)  Solid-state scintillation detector 
C)  Tungsten detector 
D)  Xenon gas detector

Question 17

Detector row collimation is equal to:

Accepted Answer

A)  D (mm) + N. 
B)  D (mm) - N. 
C)  D (mm) * N. 
D)  D (mm)/N. 
A)  D (mm) + N. 
B)  D (mm) - N. 
C)  D (mm) * N. 
D)  D (mm)/N.

Question 18

DSCT scanners require two operator consoles to input each examination's scanning parameters.

Accepted Answer

A) True 
 B)False

Question 19

The X-ray tube and detectors are able to rotate continuously during data collection as a result of slip-ring technology.

Accepted Answer

A) True 
 B)False

Question 20

Limitations of slice-by-slice sequential CT scanning include each of the following except:

Accepted Answer

A)  longer examination time. 
B)  inaccurate generation of three-dimensional (3
D)  images. 
C)  possible omitted anatomy because of patient respiration. 
D)  interpolation. 
A)  longer examination time. 
B)  inaccurate generation of three-dimensional (3
D)  images. 
C)  possible omitted anatomy because of patient respiration. 
D)  interpolation.

When the slice thickness is equal to the pixel size, the data acquired are said to be:

All of the following terms are used to refer to MSCT except:

As the pitch increases, the image quality:

MSCT scanners utilize xenon gas detectors for their high X-ray absorption.

Which of the following describes when raw data for image reconstruction can be selected on the basis of the patient's electrocardiogram (ECG)?

Which of the following is not considered a cone-beam algorithm?

Dual-source CT (DSCT) scanners are primarily used for:

The pitch ratio is expressed as:

The overall goal of MSCT is to:

Slice-by-slice sequential CT creates inaccurate generation of 3D images resulting in partial voluming artifacts.

What is defined as the distance (in millimeters) that the CT table moves during one revolution of the X-ray tube?

All of the following are advantages of MSCT except:

In 1992, the first modern multislice scanner was introduced by:

The ideal pitch in spiral/helical CT is 2:1.

In MSCT, a _________ beam geometry results, rather than a fan beam as in SSCT scanners.

What type of detector is used in MSCT scanners?

Detector row collimation is equal to:

DSCT scanners require two operator consoles to input each examination's scanning parameters.

The X-ray tube and detectors are able to rotate continuously during data collection as a result of slip-ring technology.

Limitations of slice-by-slice sequential CT scanning include each of the following except:

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

Radiation Dose in Computed Tomography

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 11: Multislice Computed Tomography: Physical Principles and Instrumentation

When the slice thickness is equal to the pixel size, the data acquired are said to be:

All of the following terms are used to refer to MSCT except:

As the pitch increases, the image quality:

MSCT scanners utilize xenon gas detectors for their high X-ray absorption.

Which of the following describes when raw data for image reconstruction can be selected on the basis of the patient's electrocardiogram (ECG)?

Which of the following is not considered a cone-beam algorithm?

Dual-source CT (DSCT) scanners are primarily used for:

The pitch ratio is expressed as:

The overall goal of MSCT is to:

Slice-by-slice sequential CT creates inaccurate generation of 3D images resulting in partial voluming artifacts.

What is defined as the distance (in millimeters) that the CT table moves during one revolution of the X-ray tube?

All of the following are advantages of MSCT except:

In 1992, the first modern multislice scanner was introduced by:

The ideal pitch in spiral/helical CT is 2:1.

In MSCT, a _________ beam geometry results, rather than a fan beam as in SSCT scanners.

What type of detector is used in MSCT scanners?

Detector row collimation is equal to:

DSCT scanners require two operator consoles to input each examination's scanning parameters.

The X-ray tube and detectors are able to rotate continuously during data collection as a result of slip-ring technology.

Limitations of slice-by-slice sequential CT scanning include each of the following except:

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

Radiation Dose in Computed Tomography

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