Question 1

Statistical methods without modeling use photon counting statistics during the reconstruction process.

Accepted Answer

A) True 
 B)False  False

Question 2

The physics model considers the radiation attenuation interactions that occur within the patient.

Accepted Answer

A) True 
 B)False  False

Question 3

The first IR was used by Professor Allan Cormack.

Accepted Answer

A) True 
 B)False  False

Question 4

Limitations presented by the filtered back-projection (FBP) algorithm include each of the following except:

Accepted Answer

A)  image noise. 
B)  artifact creation. 
C)  patient dose. 
D)  speed. 
A)  image noise. 
B)  artifact creation. 
C)  patient dose. 
D)  speed.

Question 5

The term iterative refers to the characteristics of the CT imaging system and the imaged object.

Accepted Answer

A) True 
 B)False

Question 6

FBP algorithms assume that all X-ray photon interactions take place across the full area of the detector array.

Accepted Answer

A) True 
 B)False

Question 7

The IR loop is responsible for producing raw data and subjecting it to the standard FBP algorithm.

Accepted Answer

A) True 
 B)False

Question 8

In a 2015 performance evaluation, it was noted that the reduced dose Iterative Model Reconstruction (RD IMR) algorithm proved significantly better than reduced FBP (RD FBP) algorithm in each of these pathologically processes except:

Accepted Answer

A)  intracranial hemorrhage. 
B)  hepatic cysts. 
C)  stones. 
D)  colonic diverticula. 
A)  intracranial hemorrhage. 
B)  hepatic cysts. 
C)  stones. 
D)  colonic diverticula.

Question 9

The IR loop process is complete once a predefined quality criterion in the image estimate is fulfilled.

Accepted Answer

A) True 
 B)False

Question 10

The first IR commercially available in CT scanners was the Image Reconstruction Image Space in 2009.

Accepted Answer

A) True 
 B)False

Question 11

Please match each of the following IR algorithms to the vendor who introduced it. Answer selections will be used only once.

-ASIR-V

Accepted Answer

A) GE Healthcare Systems 
B) Siemens Healthcare Systems 
C) Philips 
D) Toshiba Medical Systems 
A) GE Healthcare Systems 
B) Siemens Healthcare Systems 
C) Philips 
D) Toshiba Medical Systems

Question 12

The criteria used to evaluate IR's performance in various studies include each of the following except:

Accepted Answer

A)  noise reduction. 
B)  data acquisition speed. 
C)  dose reduction. 
D)  image quality improvements. 
A)  noise reduction. 
B)  data acquisition speed. 
C)  dose reduction. 
D)  image quality improvements.

Question 13

Please match each of the following IR algorithms to the vendor who introduced it. Answer selections will be used only once.

-SAFIRE

Accepted Answer

A) GE Healthcare Systems 
B) Siemens Healthcare Systems 
C) Philips 
D) Toshiba Medical Systems 
A) GE Healthcare Systems 
B) Siemens Healthcare Systems 
C) Philips 
D) Toshiba Medical Systems

Question 14

What step in the typical IR process generates the initial CT image from an FBP algorithm?

Accepted Answer

A)  Input 
B)  IR loop 
C)  Modeling 
D)  Output 
A)  Input 
B)  IR loop 
C)  Modeling 
D)  Output

Question 15

Which model addresses the X-ray source, image voxel, and detectors?

Accepted Answer

A)  Optics model 
B)  Noise model 
C)  Object model 
D)  Physics model 
A)  Optics model 
B)  Noise model 
C)  Object model 
D)  Physics model

Question 16

Which of the following is not a primary goal of iterative reconstruction (IR) algorithms?

Accepted Answer

A)  Reduce image noise with lower exposure technique 
B)  Preserve spatial resolution at lower exposure techniques 
C)  Reduce photon starvation artifacts 
D)  Reduce artifacts caused by patient motion 
A)  Reduce image noise with lower exposure technique 
B)  Preserve spatial resolution at lower exposure techniques 
C)  Reduce photon starvation artifacts 
D)  Reduce artifacts caused by patient motion

Question 17

As documented by a 2012 performance evaluation, what percentage of dose reduction did the ASIR algorithm result in when compared to the FBP algorithm for a CT chest exam?

Accepted Answer

A)  10.8% 
B)  26.4% 
C)  32.5% 
D)  46.4% 
A)  10.8% 
B)  26.4% 
C)  32.5% 
D)  46.4%

Question 18

Model-based IR methods attempt to model the acquisition process in hopes that the artificial image matches the acquired raw data.

Accepted Answer

A) True 
 B)False

Question 19

Please match each of the following IR algorithms to the vendor who introduced it. Answer selections will be used only once.

-iDose

Accepted Answer

A) GE Healthcare Systems 
B) Siemens Healthcare Systems 
C) Philips 
D) Toshiba Medical Systems 
A) GE Healthcare Systems 
B) Siemens Healthcare Systems 
C) Philips 
D) Toshiba Medical Systems

Question 20

What term is known as a calculation process using a series of operations that are repeated several times?

Accepted Answer

A)  Projection 
B)  Iterations 
C)  Model 
D)  Domain 
A)  Projection 
B)  Iterations 
C)  Model 
D)  Domain

Statistical methods without modeling use photon counting statistics during the reconstruction process.

The physics model considers the radiation attenuation interactions that occur within the patient.

The first IR was used by Professor Allan Cormack.

Limitations presented by the filtered back-projection (FBP) algorithm include each of the following except:

The term iterative refers to the characteristics of the CT imaging system and the imaged object.

FBP algorithms assume that all X-ray photon interactions take place across the full area of the detector array.

The IR loop is responsible for producing raw data and subjecting it to the standard FBP algorithm.

In a 2015 performance evaluation, it was noted that the reduced dose Iterative Model Reconstruction (RD IMR) algorithm proved significantly better than reduced FBP (RD FBP) algorithm in each of these pathologically processes except:

The IR loop process is complete once a predefined quality criterion in the image estimate is fulfilled.

The first IR commercially available in CT scanners was the Image Reconstruction Image Space in 2009.

Please match each of the following IR algorithms to the vendor who introduced it. Answer selections will be used only once. -ASIR-V

The criteria used to evaluate IR's performance in various studies include each of the following except:

Please match each of the following IR algorithms to the vendor who introduced it. Answer selections will be used only once. -SAFIRE

What step in the typical IR process generates the initial CT image from an FBP algorithm?

Which model addresses the X-ray source, image voxel, and detectors?

Which of the following is not a primary goal of iterative reconstruction (IR) algorithms?

As documented by a 2012 performance evaluation, what percentage of dose reduction did the ASIR algorithm result in when compared to the FBP algorithm for a CT chest exam?

Model-based IR methods attempt to model the acquisition process in hopes that the artificial image matches the acquired raw data.

Please match each of the following IR algorithms to the vendor who introduced it. Answer selections will be used only once. -iDose

What term is known as a calculation process using a series of operations that are repeated several times?

Computed Tomography: an Overview

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

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 6: Iterative Reconstruction Basics

Statistical methods without modeling use photon counting statistics during the reconstruction process.

The physics model considers the radiation attenuation interactions that occur within the patient.

The first IR was used by Professor Allan Cormack.

Limitations presented by the filtered back-projection (FBP) algorithm include each of the following except:

The term iterative refers to the characteristics of the CT imaging system and the imaged object.

FBP algorithms assume that all X-ray photon interactions take place across the full area of the detector array.

The IR loop is responsible for producing raw data and subjecting it to the standard FBP algorithm.

In a 2015 performance evaluation, it was noted that the reduced dose Iterative Model Reconstruction (RD IMR) algorithm proved significantly better than reduced FBP (RD FBP) algorithm in each of these pathologically processes except:

The IR loop process is complete once a predefined quality criterion in the image estimate is fulfilled.

The first IR commercially available in CT scanners was the Image Reconstruction Image Space in 2009.

Please match each of the following IR algorithms to the vendor who introduced it. Answer selections will be used only once. -ASIR-V

The criteria used to evaluate IR's performance in various studies include each of the following except:

Please match each of the following IR algorithms to the vendor who introduced it. Answer selections will be used only once. -SAFIRE

What step in the typical IR process generates the initial CT image from an FBP algorithm?

Which model addresses the X-ray source, image voxel, and detectors?

Which of the following is not a primary goal of iterative reconstruction (IR) algorithms?

As documented by a 2012 performance evaluation, what percentage of dose reduction did the ASIR algorithm result in when compared to the FBP algorithm for a CT chest exam?

Model-based IR methods attempt to model the acquisition process in hopes that the artificial image matches the acquired raw data.

Please match each of the following IR algorithms to the vendor who introduced it. Answer selections will be used only once. -iDose

What term is known as a calculation process using a series of operations that are repeated several times?

Computed Tomography: an Overview

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

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