Question 1

Gain calibration will remove inherent detector artifacts from an image.

Accepted Answer

A) True 
 B)False  True

Question 2

Offset correction is used to remove inherent signal that remains in a detector.

Accepted Answer

A) True 
 B)False  True

Question 3

Scintillators are phosphors that

Accepted Answer

A)  produce light when absorbing x-rays. 
B)  produce x-rays when absorbing light. 
C)  absorb light and produce electrical charges. 
D)  absorb x-rays and produce electrical charges. 
A)  produce light when absorbing x-rays. 
B)  produce x-rays when absorbing light. 
C)  absorb light and produce electrical charges. 
D)  absorb x-rays and produce electrical charges. A

Question 4

The type of flat-panel detector that uses thin films of silicon integrated with arrays of photodiodes is known as a(n)

Accepted Answer

A)  CsI detector. 
B)  charge-coupled device. 
C)  CMOS. 
D)  amorphous silicon detector. 
A)  CsI detector. 
B)  charge-coupled device. 
C)  CMOS. 
D)  amorphous silicon detector.

Question 5

All flat-panel detector systems have the ability to take images faster than the detector can accommodate.

Accepted Answer

A) True 
 B)False

Question 6

Indirect conversion in flat-panel detectors is a ____-step process.

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
A)  one 
B)  two 
C)  three 
D)  four

Question 7

Which of the following can be done to decrease the chance of having image lag occur in the next image?

Accepted Answer

A)  Decrease the amount of time between exposures. 
B)  Increase the amount of time between exposures. 
C)  Leave collimation open. 
D)  Acquire the image requiring the highest technical factors first. 
A)  Decrease the amount of time between exposures. 
B)  Increase the amount of time between exposures. 
C)  Leave collimation open. 
D)  Acquire the image requiring the highest technical factors first.

Question 8

Flat-panel detectors that use indirect conversion technology convert

Accepted Answer

A)  electrical signals to light. 
B)  light to x-rays. 
C)  x-rays to electrical signals. 
D)  x-rays to visible light. 
A)  electrical signals to light. 
B)  light to x-rays. 
C)  x-rays to electrical signals. 
D)  x-rays to visible light.

Question 9

Manufacturers make efforts to maintain a standard of less than ________ defective pixels.

Accepted Answer

A)  0.01-0.02% 
B)  0.1-0.2% 
C)  1-2% 
D)  None of the above 
A)  0.01-0.02% 
B)  0.1-0.2% 
C)  1-2% 
D)  None of the above

Question 10

CsI detectors use

Accepted Answer

A)  rare-earth scintillators. 
B)  thin crystalline needles. 
C)  miniature cameras. 
D)  specialized pixel sensors. 
A)  rare-earth scintillators. 
B)  thin crystalline needles. 
C)  miniature cameras. 
D)  specialized pixel sensors.

Question 11

Which of the following is not considered a scintillator?

Accepted Answer

A)  Gd2O2S 
B)  CsI 
C)  a-Se 
D)  None of the above 
A)  Gd2O2S 
B)  CsI 
C)  a-Se 
D)  None of the above

Question 12

Amplifiers perform all of the following functions except

Accepted Answer

A)  readout. 
B)  amplification. 
C)  noise cancelling. 
D)  analog-to-digital conversion. 
A)  readout. 
B)  amplification. 
C)  noise cancelling. 
D)  analog-to-digital conversion.

Question 13

All of the following statements are true except:

Accepted Answer

A)  As the detector ages,the number of dead pixels increases. 
B)  Software programs identify and isolate dead pixels. 
C)  Interpolation uses information from surrounding pixels to "fill in" missing information. 
D)  Dead pixels at the edge of the detector are easily identified. 
A)  As the detector ages,the number of dead pixels increases. 
B)  Software programs identify and isolate dead pixels. 
C)  Interpolation uses information from surrounding pixels to "fill in" missing information. 
D)  Dead pixels at the edge of the detector are easily identified.

Question 14

A device that includes a photosensitive array and small pixels that convert light into electrical charges is known as a ______ transistor.

Accepted Answer

A)  thin-field 
B)  field-effect 
C)  thin-film 
D)  field-energy 
A)  thin-field 
B)  field-effect 
C)  thin-film 
D)  field-energy

Question 15

Defective pixels can result from all of the following except

Accepted Answer

A)  chemical corrosion. 
B)  static discharge. 
C)  software programs. 
D)  age. 
A)  chemical corrosion. 
B)  static discharge. 
C)  software programs. 
D)  age.

Question 16

In a flat-panel detector,specialized silicon integrated circuits control

Accepted Answer

A)  line scanning sequence. 
B)  readout. 
C)  amplification. 
D)  analog-to-digital conversion. 
A)  line scanning sequence. 
B)  readout. 
C)  amplification. 
D)  analog-to-digital conversion.

Question 17

Detector performance is measured with all of the following except

Accepted Answer

A)  spatial resolution. 
B)  observation of flow contrast objects in a phantom. 
C)  DQE. 
D)  contrast. 
A)  spatial resolution. 
B)  observation of flow contrast objects in a phantom. 
C)  DQE. 
D)  contrast.

Question 18

A device that acts like a switch to send electrical charges to the image processor in a direct conversion flat-panel detector is known as a ______ transistor.

Accepted Answer

A)  thin-field 
B)  field-effect 
C)  thin-film 
D)  field-energy 
A)  thin-field 
B)  field-effect 
C)  thin-film 
D)  field-energy

Question 19

In CsI detectors

Accepted Answer

A)  there is very little light spread. 
B)  crystalline needles block light from the detector. 
C)  x-rays are converted into an electrical signal. 
D)  light spread causes resolution to decrease. 
A)  there is very little light spread. 
B)  crystalline needles block light from the detector. 
C)  x-rays are converted into an electrical signal. 
D)  light spread causes resolution to decrease.

Question 20

The absorption material can be attached to the pixel array electrically or physically.

Accepted Answer

A) True 
 B)False

Gain calibration will remove inherent detector artifacts from an image.

Offset correction is used to remove inherent signal that remains in a detector.

Scintillators are phosphors that

The type of flat-panel detector that uses thin films of silicon integrated with arrays of photodiodes is known as a(n)

All flat-panel detector systems have the ability to take images faster than the detector can accommodate.

Indirect conversion in flat-panel detectors is a ____-step process.

Which of the following can be done to decrease the chance of having image lag occur in the next image?

Flat-panel detectors that use indirect conversion technology convert

Manufacturers make efforts to maintain a standard of less than ________ defective pixels.

CsI detectors use

Which of the following is not considered a scintillator?

Amplifiers perform all of the following functions except

All of the following statements are true except:

A device that includes a photosensitive array and small pixels that convert light into electrical charges is known as a ______ transistor.

Defective pixels can result from all of the following except

In a flat-panel detector,specialized silicon integrated circuits control

Detector performance is measured with all of the following except

A device that acts like a switch to send electrical charges to the image processor in a direct conversion flat-panel detector is known as a ______ transistor.

In CsI detectors

The absorption material can be attached to the pixel array electrically or physically.

Introduction to Digital Radiography and Picture Archiving and Communication Systems

Digital Imaging Characteristics

Digital Radiographic Image Processing and Manipulation

Photostimulable Phosphor Image Capture

Charge-Coupled Devicecomplementary Metal Oxide Semiconductor Image Capture

Basic Computer Principles

Networking and Communication Basics

Picture Archiving and Communication System Fundamentals

Picture Archiving and Communication System Archiving and Peripherals

Medical Informatics

Ensuring Quality in Picture Archiving and Communication Systems

Quality Acceptance Testing Within Digital Projection Imaging

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Exam 5: Thin-Film Transistor Flat-Panel Array Image Acquisition

Gain calibration will remove inherent detector artifacts from an image.

Offset correction is used to remove inherent signal that remains in a detector.

Scintillators are phosphors that

The type of flat-panel detector that uses thin films of silicon integrated with arrays of photodiodes is known as a(n)

All flat-panel detector systems have the ability to take images faster than the detector can accommodate.

Indirect conversion in flat-panel detectors is a ____-step process.

Which of the following can be done to decrease the chance of having image lag occur in the next image?

Flat-panel detectors that use indirect conversion technology convert

Manufacturers make efforts to maintain a standard of less than ________ defective pixels.

CsI detectors use

Which of the following is not considered a scintillator?

Amplifiers perform all of the following functions except

All of the following statements are true except:

A device that includes a photosensitive array and small pixels that convert light into electrical charges is known as a ______ transistor.

Defective pixels can result from all of the following except

In a flat-panel detector,specialized silicon integrated circuits control

Detector performance is measured with all of the following except

A device that acts like a switch to send electrical charges to the image processor in a direct conversion flat-panel detector is known as a ______ transistor.

In CsI detectors

The absorption material can be attached to the pixel array electrically or physically.

Introduction to Digital Radiography and Picture Archiving and Communication Systems

Digital Imaging Characteristics

Digital Radiographic Image Processing and Manipulation

Photostimulable Phosphor Image Capture

Charge-Coupled Devicecomplementary Metal Oxide Semiconductor Image Capture

Basic Computer Principles

Networking and Communication Basics

Picture Archiving and Communication System Fundamentals

Picture Archiving and Communication System Archiving and Peripherals

Medical Informatics

Ensuring Quality in Picture Archiving and Communication Systems

Quality Acceptance Testing Within Digital Projection Imaging

Filters