Question 1

The speed with which a CT detector can detect an X-ray event and recover to detect another event is the:

Accepted Answer

A)  response time. 
B)  stability. 
C)  efficiency. 
D)  dynamic range. 
A)  response time. 
B)  stability. 
C)  efficiency. 
D)  dynamic range.

Question 2

Which scanner is based on slip-ring technology?

Accepted Answer

A)  Third-generation conventional scanner 
B)  Fourth-generation conventional scanner 
C)  Spiral/helical scanner 
D)  Fifth-generation scanner 
A)  Third-generation conventional scanner 
B)  Fourth-generation conventional scanner 
C)  Spiral/helical scanner 
D)  Fifth-generation scanner

Question 3

Which detector characteristic refers to the steadiness of the detector response?

Accepted Answer

A)  Efficiency 
B)  Stability 
C)  Response time 
D)  Dynamic range 
A)  Efficiency 
B)  Stability 
C)  Response time 
D)  Dynamic range

Question 4

Which of the following is commonly used in gas-ionization CT detectors?

Accepted Answer

A)  Xenon 
B)  Oxygen 
C)  Neon 
D)  Helium 
A)  Xenon 
B)  Oxygen 
C)  Neon 
D)  Helium

Question 5

Which CT scanner is based on a fan-beam geometry and complete rotation of the X-ray tube and detectors?

Accepted Answer

A)  First-generation scanner 
B)  Second-generation scanner 
C)  Third-generation scanner 
D)  Fourth-generation scanner 
A)  First-generation scanner 
B)  Second-generation scanner 
C)  Third-generation scanner 
D)  Fourth-generation scanner

Question 6

Which scanner results in a volume of the patient being scanned during a single breath-hold (rather than a single slice of tissue)?

Accepted Answer

A)  Spiral/helical scanner 
B)  Seventh-generation scanner 
C)  Second-generation scanner 
D)  First-generation scanner 
A)  Spiral/helical scanner 
B)  Seventh-generation scanner 
C)  Second-generation scanner 
D)  First-generation scanner

Question 7

Which X-ray generator is used in modern CT scanners?

Accepted Answer

A)  Single-phase half-wave rectified 
B)  Single-phase full-wave rectified 
C)  High-frequency generator 
D)  Three-phase, six-pulse generator 
A)  Single-phase half-wave rectified 
B)  Single-phase full-wave rectified 
C)  High-frequency generator 
D)  Three-phase, six-pulse generator

Question 8

Photodiodes are now used in CT scintillation detectors.

Accepted Answer

A) True 
 B)False

Question 9

The purpose of collimation in CT is each of the following except:

Accepted Answer

A)  create an homogenous beam. 
B)  to protect the patient. 
C)  to ensure a constant beam width at the detector. 
D)  to reduce scatter radiation. 
A)  create an homogenous beam. 
B)  to protect the patient. 
C)  to ensure a constant beam width at the detector. 
D)  to reduce scatter radiation.

Question 10

Please match the following data acquisition concepts. All answer selections will be used just once.

-Semiconductor

Accepted Answer

A) Data acquisition system 
B) Flashes of light 
C) Beam hardening 
D) Xenon gas 
E) Slice thickness
F)Photodiode
G)Continuous gantry rotation 
A) Data acquisition system 
B) Flashes of light 
C) Beam hardening 
D) Xenon gas 
E) Slice thickness
F)Photodiode
G)Continuous gantry rotation

Question 11

The total number of data samples per scan or per slice in CT is the:

Accepted Answer

A)  number of data samples per view times the number of views. 
B)  number of views. 
C)  number of detectors plus the number of data samples per detector. 
D)  number of data samples per view plus the number of views. 
A)  number of data samples per view times the number of views. 
B)  number of views. 
C)  number of detectors plus the number of data samples per detector. 
D)  number of data samples per view plus the number of views.

Question 12

Please match the following data acquisition concepts. All answer selections will be used just once.

-Slip-ring design

Accepted Answer

A) Data acquisition system 
B) Flashes of light 
C) Beam hardening 
D) Xenon gas 
E) Slice thickness
F)Photodiode
G)Continuous gantry rotation 
A) Data acquisition system 
B) Flashes of light 
C) Beam hardening 
D) Xenon gas 
E) Slice thickness
F)Photodiode
G)Continuous gantry rotation

Question 13

What design of collimation is influenced by the size of the focal spot?

Accepted Answer

A)  Prepatient collimation 
B)  Postpatient collimation 
C)  Predetector collimation 
D)  Postdetector collimation 
A)  Prepatient collimation 
B)  Postpatient collimation 
C)  Predetector collimation 
D)  Postdetector collimation

Question 14

Which of the following refers to the size, shape, motion, and path traced by the X-ray beam as it scans the patient?

Accepted Answer

A)  Beam geometry 
B)  Projection profile 
C)  Data acquisition 
D)  Detector tracing 
A)  Beam geometry 
B)  Projection profile 
C)  Data acquisition 
D)  Detector tracing

Question 15

What category of multirow detector array utilizes an isotropic design?

Accepted Answer

A)  Adaptive array detectors 
B)  Matrix array detectors 
C)  Unilateral array detectors 
D)  Identical array detectors 
A)  Adaptive array detectors 
B)  Matrix array detectors 
C)  Unilateral array detectors 
D)  Identical array detectors

Question 16

The high-voltage generators of slip-ring scanners are located in the gantry.

Accepted Answer

A) True 
 B)False

Question 17

Anistrophic is a term used to describe detector channels that are equal in size.

Accepted Answer

A) True 
 B)False

Question 18

Sixth-generation scanners are referred to as the cine CT scanner because of its high-speed acquisition for imaging the heart and circulation.

Accepted Answer

A) True 
 B)False

Question 19

Fourth-generation CT scanners are characterized by:

Accepted Answer

A)  rotate-translate motion and parallel beam geometry. 
B)  rotate-translate motion and fan-beam geometry. 
C)  fan-beam geometry and continuous rotation of X-ray tube and detectors 
D)  fan-beam geometry and complete rotation of X-ray tube around a stationary ring of detectors 
A)  rotate-translate motion and parallel beam geometry. 
B)  rotate-translate motion and fan-beam geometry. 
C)  fan-beam geometry and continuous rotation of X-ray tube and detectors 
D)  fan-beam geometry and complete rotation of X-ray tube around a stationary ring of detectors

Question 20

Which of the following X-ray tubes is most likely used in spiral/helical CT scanners?

Accepted Answer

A)  A tungsten target fixed anode tube 
B)  A tungsten target rotating anode tube 
C)  A molybdenum target rotating anode tube 
D)  A rotating anode tube with a rhenium tungsten disk 
A)  A tungsten target fixed anode tube 
B)  A tungsten target rotating anode tube 
C)  A molybdenum target rotating anode tube 
D)  A rotating anode tube with a rhenium tungsten disk

The speed with which a CT detector can detect an X-ray event and recover to detect another event is the:

Which scanner is based on slip-ring technology?

Which detector characteristic refers to the steadiness of the detector response?

Which of the following is commonly used in gas-ionization CT detectors?

Which CT scanner is based on a fan-beam geometry and complete rotation of the X-ray tube and detectors?

Which scanner results in a volume of the patient being scanned during a single breath-hold (rather than a single slice of tissue)?

Which X-ray generator is used in modern CT scanners?

Photodiodes are now used in CT scintillation detectors.

The purpose of collimation in CT is each of the following except:

Please match the following data acquisition concepts. All answer selections will be used just once. -Semiconductor

The total number of data samples per scan or per slice in CT is the:

Please match the following data acquisition concepts. All answer selections will be used just once. -Slip-ring design

What design of collimation is influenced by the size of the focal spot?

Which of the following refers to the size, shape, motion, and path traced by the X-ray beam as it scans the patient?

What category of multirow detector array utilizes an isotropic design?

The high-voltage generators of slip-ring scanners are located in the gantry.

Anistrophic is a term used to describe detector channels that are equal in size.

Sixth-generation scanners are referred to as the cine CT scanner because of its high-speed acquisition for imaging the heart and circulation.

Fourth-generation CT scanners are characterized by:

Which of the following X-ray tubes is most likely used in spiral/helical CT scanners?

Computed Tomography: an Overview

Digital Image Processing

Physical Principles of Computed Tomography

Image Reconstruction

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 4: Data Acquisition Concepts

The speed with which a CT detector can detect an X-ray event and recover to detect another event is the:

Which scanner is based on slip-ring technology?

Which detector characteristic refers to the steadiness of the detector response?

Which of the following is commonly used in gas-ionization CT detectors?

Which CT scanner is based on a fan-beam geometry and complete rotation of the X-ray tube and detectors?

Which scanner results in a volume of the patient being scanned during a single breath-hold (rather than a single slice of tissue)?

Which X-ray generator is used in modern CT scanners?

Photodiodes are now used in CT scintillation detectors.

The purpose of collimation in CT is each of the following except:

Please match the following data acquisition concepts. All answer selections will be used just once. -Semiconductor

The total number of data samples per scan or per slice in CT is the:

Please match the following data acquisition concepts. All answer selections will be used just once. -Slip-ring design

What design of collimation is influenced by the size of the focal spot?

Which of the following refers to the size, shape, motion, and path traced by the X-ray beam as it scans the patient?

What category of multirow detector array utilizes an isotropic design?

The high-voltage generators of slip-ring scanners are located in the gantry.

Anistrophic is a term used to describe detector channels that are equal in size.

Sixth-generation scanners are referred to as the cine CT scanner because of its high-speed acquisition for imaging the heart and circulation.

Fourth-generation CT scanners are characterized by:

Which of the following X-ray tubes is most likely used in spiral/helical CT scanners?

Computed Tomography: an Overview

Digital Image Processing

Physical Principles of Computed Tomography

Image Reconstruction

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