Question 1

The part of the reader that consists of a laser, optical filters, light-collecting optics, and beam-shaping devices that is designed to project and guide a precisely controlled laser beam back and forth across the plate as the plate moves through the scan area is the

Accepted Answer

A)   photodetector
B)   optical system
C)   drive mechanism
D)   photostimulable luminescenceE) None of the above
F) A) and C)

Question 2

The values of interest (VOI)

Accepted Answer

A)   is the graphic representation of a data set
B)   determine what section of the histogram data set should be included in the displayed image
C)   determine what section of the histogram data set should be included in the latent image
D)   is the useful area of the digital image receptorE) B) and D)
F) A) and D)

Question 3

Where is the PSP plate located?

Accepted Answer

A)   On the inside the cassette.
B)   On the outside the cassette.
C)   Computer workstation.
D)   On the detector array.E) A) and C)
F) B) and C)

Question 4

The part of the reader that senses the light released from the PSP plate is the

Accepted Answer

A)   photodetector
B)   optical system
C)   drive mechanism
D)   photostimulable luminescenceE) A) and C)
F) B) and C)

Question 5

Which of the following is the correct sequence for extracting and processing the image with the PSP plate?

Accepted Answer

A)   Signal sent to ADC; scanned by laser light; sampling of signal; converted to electronic signal
B)   Converted to electronic signal; sampling of signal; signal sent to ADC; scanned by laser light
C)   Scanned by laser light; converted to electronic signal; sampling of signal; signal sent to ADC
D)   None of theseE) A) and B)
F) A) and C)

Question 6

Postprocessing functions

Accepted Answer

A)   allow changes to be made in the appearance of the digital image
B)   are done through computer software operations
C)   include window width and window level adjustments
D)   All of theseE) B) and D)
F) A) and B)

Question 7

The two methods for indirect capture in DR include

Accepted Answer

A)   charge-coupled devices
B)   photoconductors and TFT arrays
C)   scintillator and TFT array
D)   charge-coupled devices and scintillator and TFT arrayE) B) and D)
F) None of the above

Question 8

The human eye can appreciate approximately _______ shades of gray at a particular level.

Accepted Answer

A)   5
B)   10
C)   30
D)   300E) A) and C)
F) None of the above

Question 9

Which of the following statements is false concerning Complimentary Metal Oxide Semiconductors (CMOSs)

Accepted Answer

A)   Each detector element has its own amplifier, photodiode, storage capacitor, and are surrounded by transistors
B)   They have light sensitivity and resolution that is equal to or better than CCDs
C)   They are very inexpensive to manufacture
D)   They are currently options for mammography and dental radiography machinesE) None of the above
F) A) and B)

Question 10

In CR, this represents the exposure level to the PSP plate

Accepted Answer

A)   exposure indicator
B)   dose-area product (DAP) 
C)   detective quantum efficiency (DQ
E)  
D)   dynamic rangeE) None of the above
F) C) and D)

Question 11

The scintillator for the indirect capture DR system that utilizes a CCD is

Accepted Answer

A)   cesium iodide
B)   barium fluorohalide
C)   amorphous selenium
D)   crystalline siliconE) A) and D)
F) A) and C)

Question 12

Which of the following describes a new method of storing digital studies that makes use of a special recording medium and laser technology to record data throughout the depth of the medium?

Accepted Answer

A)   Network attached storage (NAS) 
B)   High capacity flash drives
C)   Magnetic tape
D)   Holographic disk deviceE) A) and B)
F) C) and D)

Question 13

Amorphous silicon is used as the

Accepted Answer

A)   photoconductor for indirect capture DR imaging
B)   photodetector for indirect capture DR imaging
C)   photoconductor for direct capture DR imaging
D)   photodetector for direct capture DR imagingE) None of the above
F) B) and C)

Question 14

Related to the DR detector,______________ is an expression of the radiation exposure level that is required to produce an optimal image.

Accepted Answer

A)   exposure indicator
B)   dose-area product (DAP) 
C)   detective quantum efficiency (DQ
E)  
D)   target exposure indexE) A) and D)
F) C) and D)

Question 15

The useful imaging area of the digital receptor is the

Accepted Answer

A)   detector element (DEL) 
B)   field of view (FOV) 
C)   thin-film transistor (TFT) 
D)   values of interest (VOI) E) A) and B)
F) A) and C)

Question 16

For CR systems, the exposure index is based on

Accepted Answer

A)   how much exposure leaves the x-ray tube
B)   how much mAs was set at the operators console
C)   the histogram analysis
D)   the kVp being usedE) A) and C)
F) B) and D)

Question 17

The histogram is

Accepted Answer

A)   the digital radiographic image
B)   the electronic signal from the ADC
C)   a graphic representation of a data set
D)   the digital radiographic image and a graphic representation of a data setE) B) and C)
F) B) and D)

Question 18

DQE is

Accepted Answer

A)   evaluated by comparing the image noise of a detector with that of an "ideal" detector with the same signal-response characteristics
B)   a measure of how well the signal-to-noise ratio (SNR)  is preserved in an image
C)   the exposure necessary to produce a desired level of brightness
D)   evaluated by comparing the image noise of a detector with that of an "ideal" detector with the same signal-response characteristics and a measure of how well the signal-to-noise ratio (SNR)  is preserved in an imageE) A) and D)
F) B) and D)

Question 19

Following the detection of the light released from the phosphor layer, the amplified signal is sent to the _____________ to convert it to a digital electronic signal for the display computer

Accepted Answer

A)   digital-to-analog converter (DA
C)  
B)   analog-to-digital converter (AD
C)  
C)   light-to-computer device (LT
C)  
D)   none of theseE) None of the above
F) A) and B)

Question 20

__________ is the standard format for digital medical images

Accepted Answer

A)   PACS
B)   DICOM
C)   Teleradiology
D)   RISE) A) and C)
F) B) and C)

Exam 10: Digital Image Receptors

__________ is the standard format for digital medical images

Correct AnswerverifiedShow Answer

Which of the following is the correct sequence for extracting and processing the image with the PSP plate?

Correct AnswerverifiedShow Answer

The values of interest (VOI)

Correct AnswerverifiedShow Answer

Postprocessing functions

Correct AnswerverifiedShow Answer

Following the detection of the light released from the phosphor layer, the amplified signal is sent to the _____________ to convert it to a digital electronic signal for the display computer

Correct AnswerverifiedShow Answer

The part of the reader that consists of a laser, optical filters, light-collecting optics, and beam-shaping devices that is designed to project and guide a precisely controlled laser beam back and forth across the plate as the plate moves through the scan area is the

Correct AnswerverifiedShow Answer

Where is the PSP plate located?

Correct AnswerverifiedShow Answer

The scintillator for the indirect capture DR system that utilizes a CCD is

Correct AnswerverifiedShow Answer

Which of the following statements is false concerning Complimentary Metal Oxide Semiconductors (CMOSs)

Correct AnswerverifiedShow Answer

The human eye can appreciate approximately _______ shades of gray at a particular level.

Correct AnswerverifiedShow Answer

The two methods for indirect capture in DR include

Correct AnswerverifiedShow Answer

In CR, this represents the exposure level to the PSP plate

Correct AnswerverifiedShow Answer

Amorphous silicon is used as the

Correct AnswerverifiedShow Answer

For CR systems, the exposure index is based on

Correct AnswerverifiedShow Answer

DQE is

Correct AnswerverifiedShow Answer

The histogram is

Correct AnswerverifiedShow Answer

Which of the following describes a new method of storing digital studies that makes use of a special recording medium and laser technology to record data throughout the depth of the medium?

Correct AnswerverifiedShow Answer

The useful imaging area of the digital receptor is the

Correct AnswerverifiedShow Answer

Related to the DR detector,______________ is an expression of the radiation exposure level that is required to produce an optimal image.

Correct AnswerverifiedShow Answer

The part of the reader that senses the light released from the PSP plate is the

Correct AnswerverifiedShow Answer

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