GXMO PRACTICE TEST QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
The smallest component of an image matrix that represents a specific location in
the patient is called a:
A. Pixel
B. Voxel
C. Histogram
D. Algorithm
✔✔ Answer: A. Pixel
Adjusting the window level of a digital image mainly changes the image:
A. Brightness (density)
B. Contrast
C. Spatial detail
D. Resolution
✔✔ Answer: A. Brightness (density)
Increasing the window width of a digital image on the monitor will:
A. Increase image brightness
B. Decrease image brightness
C. Increase image contrast
D. Decrease image contrast
✔✔ Answer: D. Decrease image contrast
Matrix size is the major determinant of image
,a. contrast
b. brightness
c. resolution
d. noise
resolution
Digital image noise from quantum mottle can be decreased by
a. decreasing the exposure
b. increasing the exposure
c. increasing edge enhancement during post-processing
d. decreasing the window level
increasing the exposure
The first step in the digital imaging process is
a. processing
b. acquisition
c. display
acquistion
In ______ image formation the analog to digital conversion step is eliminated.
,a. computed radiography (CR)
b. direct digital radiography (DR)
direct digital radiography (DR)
Where is the latent image formed in computed radiography?
a. in the monitor screen
b. in the photostimulable phosphor
c. in the photomultiplier tube
d. in the analog-to-digital converter
in the photostimulable phosphor
What type of laser is used to release the energy stored in the CR phosphors?
a. argon
b. krypton
c. fluorohalide
d. helium-neon
helium-neon
In a CR system, what is the device that collects, amplifies and converts the
released light to an electronic signal?
, a. the laser beam
b. the cathode ray tube
c. the photomultiplier tube
d. the analog-to-digital converter
the photomultiplier tube
Prior to being reused, the CR imaging plate must be
a. exposed to intense light
b. cooled to 50 degrees F
c. recharged
d. none of the above
exposed to intense light
What are the mathematical calculations used for image construction for a specific
examination called?
a. interpolation
b. algorithm
c. extrapolations
d. logarithms
algorithm
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
The smallest component of an image matrix that represents a specific location in
the patient is called a:
A. Pixel
B. Voxel
C. Histogram
D. Algorithm
✔✔ Answer: A. Pixel
Adjusting the window level of a digital image mainly changes the image:
A. Brightness (density)
B. Contrast
C. Spatial detail
D. Resolution
✔✔ Answer: A. Brightness (density)
Increasing the window width of a digital image on the monitor will:
A. Increase image brightness
B. Decrease image brightness
C. Increase image contrast
D. Decrease image contrast
✔✔ Answer: D. Decrease image contrast
Matrix size is the major determinant of image
,a. contrast
b. brightness
c. resolution
d. noise
resolution
Digital image noise from quantum mottle can be decreased by
a. decreasing the exposure
b. increasing the exposure
c. increasing edge enhancement during post-processing
d. decreasing the window level
increasing the exposure
The first step in the digital imaging process is
a. processing
b. acquisition
c. display
acquistion
In ______ image formation the analog to digital conversion step is eliminated.
,a. computed radiography (CR)
b. direct digital radiography (DR)
direct digital radiography (DR)
Where is the latent image formed in computed radiography?
a. in the monitor screen
b. in the photostimulable phosphor
c. in the photomultiplier tube
d. in the analog-to-digital converter
in the photostimulable phosphor
What type of laser is used to release the energy stored in the CR phosphors?
a. argon
b. krypton
c. fluorohalide
d. helium-neon
helium-neon
In a CR system, what is the device that collects, amplifies and converts the
released light to an electronic signal?
, a. the laser beam
b. the cathode ray tube
c. the photomultiplier tube
d. the analog-to-digital converter
the photomultiplier tube
Prior to being reused, the CR imaging plate must be
a. exposed to intense light
b. cooled to 50 degrees F
c. recharged
d. none of the above
exposed to intense light
What are the mathematical calculations used for image construction for a specific
examination called?
a. interpolation
b. algorithm
c. extrapolations
d. logarithms
algorithm
