Question 1

The new generation of MSCT scanners requires modified image reconstruction algorithms.

Accepted Answer

A) True 
 B)False  True

Question 2

The measurement of the total X-ray absorption of a particular ray is defined as a view.

Accepted Answer

A) True 
 B)False  False

Question 3

The algorithms for the single-slice (SCCT) and MSCT scanners with four detector rows are referred to as spiral/helical fan-beam approximation algorithms.

Accepted Answer

A) True 
 B)False  True

Question 4

Convolution kernels can be applied to any type of data.

Accepted Answer

A) True 
 B)False

Question 5

Please match the image reconstruction concepts. All answer selections will be used just once.

-Fourier transform

Accepted Answer

A) Set of directions for getting a specific output from a specific input 
B) Mathematical technique of value estimation 
C) Converts signals in the spatial domain to the frequency domain 
D) Digital image processing technique to modify images through filter function 
E) Generation of multiple attenuated measurements 
A) Set of directions for getting a specific output from a specific input 
B) Mathematical technique of value estimation 
C) Converts signals in the spatial domain to the frequency domain 
D) Digital image processing technique to modify images through filter function 
E) Generation of multiple attenuated measurements

Question 6

The algorithms for three-dimensional imaging are based on those used in computer graphics and visual perception science.

Accepted Answer

A) True 
 B)False

Question 7

An algorithm is a set of rules for solving a problem.

Accepted Answer

A) True 
 B)False

Question 8

Please match the image reconstruction concepts. All answer selections will be used just once.

-Projection

Accepted Answer

A) Set of directions for getting a specific output from a specific input 
B) Mathematical technique of value estimation 
C) Converts signals in the spatial domain to the frequency domain 
D) Digital image processing technique to modify images through filter function 
E) Generation of multiple attenuated measurements 
A) Set of directions for getting a specific output from a specific input 
B) Mathematical technique of value estimation 
C) Converts signals in the spatial domain to the frequency domain 
D) Digital image processing technique to modify images through filter function 
E) Generation of multiple attenuated measurements

Question 9

Which of the following algorithms compares an assumption with the measured values, makes corrections, and then repeats the process?

Accepted Answer

A)  Analytical reconstruction algorithms 
B)  Back-projection 
C)  IR algorithms 
D)  Fourier reconstruction algorithms 
A)  Analytical reconstruction algorithms 
B)  Back-projection 
C)  IR algorithms 
D)  Fourier reconstruction algorithms

Question 10

A set of ray sums is referred to as a:

Accepted Answer

A)  ray sum. 
B)  projection. 
C)  total ray projection. 
D)  view. 
A)  ray sum. 
B)  projection. 
C)  total ray projection. 
D)  view.

Question 11

Please match the image reconstruction concepts. All answer selections will be used just once.

-Algorithm

Accepted Answer

A) Set of directions for getting a specific output from a specific input 
B) Mathematical technique of value estimation 
C) Converts signals in the spatial domain to the frequency domain 
D) Digital image processing technique to modify images through filter function 
E) Generation of multiple attenuated measurements 
A) Set of directions for getting a specific output from a specific input 
B) Mathematical technique of value estimation 
C) Converts signals in the spatial domain to the frequency domain 
D) Digital image processing technique to modify images through filter function 
E) Generation of multiple attenuated measurements

Question 12

Which is a mathematical technique used to estimate the value of a function from known values on either side of the function?

Accepted Answer

A)  Convolution 
B)  Interpolation 
C)  Back-projection 
D)  Projection ratio 
A)  Convolution 
B)  Interpolation 
C)  Back-projection 
D)  Projection ratio

Question 13

Which of the following refers to a function that relates to the amplitude and phases of a sine wave and corresponds to a specific frequency?

Accepted Answer

A)  Fourier transform 
B)  Algorithm 
C)  Convolution 
D)  Interpolation 
A)  Fourier transform 
B)  Algorithm 
C)  Convolution 
D)  Interpolation

Question 14

Please match the image reconstruction concepts. All answer selections will be used just once.

-Convolution

Accepted Answer

A) Set of directions for getting a specific output from a specific input 
B) Mathematical technique of value estimation 
C) Converts signals in the spatial domain to the frequency domain 
D) Digital image processing technique to modify images through filter function 
E) Generation of multiple attenuated measurements 
A) Set of directions for getting a specific output from a specific input 
B) Mathematical technique of value estimation 
C) Converts signals in the spatial domain to the frequency domain 
D) Digital image processing technique to modify images through filter function 
E) Generation of multiple attenuated measurements

Question 15

Which is a class of cone-beam algorithms available for use with the new generation of multislice CT (MSCT) scanners?

Accepted Answer

A)  Filtered cone-beam algorithms 
B)  Convoluted cone-beam algorithms 
C)  Exact cone-beam algorithms 
D)  Three-dimensional cone-beam algorithms 
A)  Filtered cone-beam algorithms 
B)  Convoluted cone-beam algorithms 
C)  Exact cone-beam algorithms 
D)  Three-dimensional cone-beam algorithms

Question 16

All of the following describe basic problems with the back-projection algorithm except:

Accepted Answer

A)  the produced image is blurred. 
B)  the image not useful for clinical CT. 
C)  compares assumptions with measured values. 
D)  the image suffers from a star pattern artifact. 
A)  the produced image is blurred. 
B)  the image not useful for clinical CT. 
C)  compares assumptions with measured values. 
D)  the image suffers from a star pattern artifact.

Question 17

Which of the following will allow the user to interactively visualize, manipulate, and measure large three-dimensional objects on general-purpose workstations?

Accepted Answer

A)  Three-dimensional algorithms 
B)  Interpolation algorithms 
C)  Fourier transform 
D)  Three-dimensional convolution 
A)  Three-dimensional algorithms 
B)  Interpolation algorithms 
C)  Fourier transform 
D)  Three-dimensional convolution

Question 18

Which of the following is a digital image processing technique used to modify images through a filter function?

Accepted Answer

A)  Convolution 
B)  Interpolation 
C)  Back-projection 
D)  Projection filter 
A)  Convolution 
B)  Interpolation 
C)  Back-projection 
D)  Projection filter

Question 19

The Fourier transform is a technique for estimating a function from known values on both sides of it.

Accepted Answer

A) True 
 B)False

Question 20

A large cone beam will result in cone-beam artifacts.

Accepted Answer

A) True 
 B)False

The new generation of MSCT scanners requires modified image reconstruction algorithms.

The measurement of the total X-ray absorption of a particular ray is defined as a view.

The algorithms for the single-slice (SCCT) and MSCT scanners with four detector rows are referred to as spiral/helical fan-beam approximation algorithms.

Convolution kernels can be applied to any type of data.

Please match the image reconstruction concepts. All answer selections will be used just once. -Fourier transform

The algorithms for three-dimensional imaging are based on those used in computer graphics and visual perception science.

An algorithm is a set of rules for solving a problem.

Please match the image reconstruction concepts. All answer selections will be used just once. -Projection

Which of the following algorithms compares an assumption with the measured values, makes corrections, and then repeats the process?

A set of ray sums is referred to as a:

Please match the image reconstruction concepts. All answer selections will be used just once. -Algorithm

Which is a mathematical technique used to estimate the value of a function from known values on either side of the function?

Which of the following refers to a function that relates to the amplitude and phases of a sine wave and corresponds to a specific frequency?

Please match the image reconstruction concepts. All answer selections will be used just once. -Convolution

Which is a class of cone-beam algorithms available for use with the new generation of multislice CT (MSCT) scanners?

All of the following describe basic problems with the back-projection algorithm except:

Which of the following will allow the user to interactively visualize, manipulate, and measure large three-dimensional objects on general-purpose workstations?

Which of the following is a digital image processing technique used to modify images through a filter function?

The Fourier transform is a technique for estimating a function from known values on both sides of it.

A large cone beam will result in cone-beam artifacts.

Computed Tomography: an Overview

Digital Image Processing

Physical Principles of Computed Tomography

Data Acquisition Concepts

Iterative Reconstruction Basics

Basic Instrumentation

Image Postprocessing and Visualization Tools

Image Quality

Radiation Dose in Computed Tomography

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 5: Image Reconstruction

The new generation of MSCT scanners requires modified image reconstruction algorithms.

The measurement of the total X-ray absorption of a particular ray is defined as a view.

The algorithms for the single-slice (SCCT) and MSCT scanners with four detector rows are referred to as spiral/helical fan-beam approximation algorithms.

Convolution kernels can be applied to any type of data.

Please match the image reconstruction concepts. All answer selections will be used just once. -Fourier transform

The algorithms for three-dimensional imaging are based on those used in computer graphics and visual perception science.

An algorithm is a set of rules for solving a problem.

Please match the image reconstruction concepts. All answer selections will be used just once. -Projection

Which of the following algorithms compares an assumption with the measured values, makes corrections, and then repeats the process?

A set of ray sums is referred to as a:

Please match the image reconstruction concepts. All answer selections will be used just once. -Algorithm

Which is a mathematical technique used to estimate the value of a function from known values on either side of the function?

Which of the following refers to a function that relates to the amplitude and phases of a sine wave and corresponds to a specific frequency?

Please match the image reconstruction concepts. All answer selections will be used just once. -Convolution

Which is a class of cone-beam algorithms available for use with the new generation of multislice CT (MSCT) scanners?

All of the following describe basic problems with the back-projection algorithm except:

Which of the following will allow the user to interactively visualize, manipulate, and measure large three-dimensional objects on general-purpose workstations?

Which of the following is a digital image processing technique used to modify images through a filter function?

The Fourier transform is a technique for estimating a function from known values on both sides of it.

A large cone beam will result in cone-beam artifacts.

Computed Tomography: an Overview

Digital Image Processing

Physical Principles of Computed Tomography

Data Acquisition Concepts

Iterative Reconstruction Basics

Basic Instrumentation

Image Postprocessing and Visualization Tools

Image Quality

Radiation Dose in Computed Tomography

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