Question 1

Histogram analysis compares the histogram with histograms specific to:

Accepted Answer

A)   the x-ray equipment
B)   the computer monitor
C)   the patient data
D)   the anatomic part being imagedE) A) and D)
F) All of the above

Question 2

Indirect capture cassette-less digital imaging systems use:

Accepted Answer

A)   charge-coupled devices
B)   photoconductors and TFT arrays
C)   scintillator and TFT array
D)   A and CE) A) and D)
F) B) and C)

Question 3

The ideal expression of digital detector image resolution is the:

Accepted Answer

A)   Nyquist frequency
B)   MTF
C)   LSR
D)   DQEE) B) and C)
F) A) and D)

Question 4

Adjustments in window width and level allow a limited portion of the gray scale to be expanded and the gray levels differentiated in the image.

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

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

Question 6

The range of exposure intensities that an IR can respond to and acquire image data is:

Accepted Answer

A)   dynamic range
B)   exposure range
C)   brightness range
D)   all of the aboveE) B) and D)
F) B) and C)

Question 7

The purpose of film processing is to convert the _______________ image to the __________________ image.

Accepted Answer

A)   manifest;manifest
B)   manifest;latent
C)   latent;manifest
D)   latent;latentE) A) and B)
F) A) and C)

Question 8

The fixing stage:

Accepted Answer

A)   hardens the emulsion
B)   removes unexposed silver halide crystals
C)   makes the image permanent
D)   all of the aboveE) A) and B)
F) C) and D)

Question 9

With cassette-less digital radiography,the detector array:

Accepted Answer

A)   is used exactly like a cassette
B)   replaces the bucky assembly
C)   transfers the digital data directly to a computer
D)   B and CE) None of the above
F) C) and D)

Question 10

Having a reflective layer in an intensifying screen results in the screen having a(n) ________ screen speed.

Accepted Answer

A)   slower
B)   faster
C)   identical
D)   none of the aboveE) A) and B)
F) A) and C)

Question 11

__________ is the standard format for digital medical images.

Accepted Answer

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

Question 12

For cassette-based digital systems,the EI 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 B)
F) All of the above

Question 13

Lead foil may be located in the ___________ of a film cassette to prevent backscatter from reaching the film.

Accepted Answer

A)   front
B)   back
C)   middle
D)   none of the aboveE) A) and B)
F) A) and D)

Question 14

The test tool to evaluate film-screen contact is the:

Accepted Answer

A)   densitometer
B)   sensitometer
C)   wire mesh
D)   penetrometerE) All of the above
F) None of the above

Question 15

Which of the following cassette-less digital image receptors does not use a network of TFTs?

Accepted Answer

A)   indirect capture with CCD
B)   indirect capture with amorphous silicon photodetector
C)   direct capture with amorphous selenium photoconductor
D)   none of the above use TFTsE) A) and C)
F) C) and D)

Question 16

_______________ is a flat metal surface that helps to align the film as it enters the processor.

Accepted Answer

A)   recirculation
B)   the feed tray
C)   the standby control
D)   replenishmentE) A) and B)
F) A) and C)

Question 17

The rare earth phosphors are used in the intensifying screen to:

Accepted Answer

A)   protect the active layer
B)   convert x-rays to light photons
C)   convert light photons to x-rays
D)   provide physical support for the active layerE) All of the above
F) C) and D)

Question 18

The manifest image:

Accepted Answer

A)   is the image after exposure to exit radiation and before chemical processing
B)   is the image after chemical processing
C)   is the radiographic image
D)   B and CE) A) and B)
F) B) and D)

Question 19

As compared with the H&D curve of film with the toe,straight-line portion,and shoulder,the response of a digital IR to exposure is:

Accepted Answer

A)   more curved
B)   a straight line
C)   a line and a curve
D)   a curve but less than filmE) A) and C)
F) B) and D)

Question 20

As the matrix size decreases,the spatial resolution:

Accepted Answer

A)   increases
B)   decreases
C)   remains the same
D)   none of the aboveE) None of the above
F) C) and D)

Exam 12: Image Receptors

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

Correct AnswerverifiedShow Answer

Histogram analysis compares the histogram with histograms specific to:

Correct AnswerverifiedShow Answer

Adjustments in window width and level allow a limited portion of the gray scale to be expanded and the gray levels differentiated in the image.

Correct AnswerverifiedShow Answer

The manifest image:

Correct AnswerverifiedShow Answer

Indirect capture cassette-less digital imaging systems use:

Correct AnswerverifiedShow Answer

The test tool to evaluate film-screen contact is the:

Correct AnswerverifiedShow Answer

The ideal expression of digital detector image resolution is the:

Correct AnswerverifiedShow Answer

With cassette-less digital radiography,the detector array:

Correct AnswerverifiedShow Answer

The fixing stage:

Correct AnswerverifiedShow Answer

Which of the following cassette-less digital image receptors does not use a network of TFTs?

Correct AnswerverifiedShow Answer

As compared with the H&D curve of film with the toe,straight-line portion,and shoulder,the response of a digital IR to exposure is:

Correct AnswerverifiedShow Answer

As the matrix size decreases,the spatial resolution:

Correct AnswerverifiedShow Answer

The rare earth phosphors are used in the intensifying screen to:

Correct AnswerverifiedShow Answer

For cassette-based digital systems,the EI is based on:

Correct AnswerverifiedShow Answer

Lead foil may be located in the ___________ of a film cassette to prevent backscatter from reaching the film.

Correct AnswerverifiedShow Answer

The range of exposure intensities that an IR can respond to and acquire image data is:

Correct AnswerverifiedShow Answer

Having a reflective layer in an intensifying screen results in the screen having a(n) ________ screen speed.

Correct AnswerverifiedShow Answer

__________ is the standard format for digital medical images.

Correct AnswerverifiedShow Answer

The purpose of film processing is to convert the _______________ image to the __________________ image.

Correct AnswerverifiedShow Answer

_______________ is a flat metal surface that helps to align the film as it enters the processor.

Correct AnswerverifiedShow Answer

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The purpose of film processing is to convert the _ image to the ____ image.

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