Each digital image is composed of rows and columns of pixels arranged into a(n)
a. voxel
b. matrix
c. algorithm
d. byte
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matrix
During CR imaging plate processing, when the laser frees trapped electrons allowing
them to return to a lower energy state, what color of light photon is released?
a. red-orange
,b. ultraviolet
c. blue-purple
d. green-yellow
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blue-purple
Image sharpness is determined by the:
a. size of the electron stream
b. size of the actual focal spot
c. size of the effective focal spot
d. speed of rotation
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size of the effective focal spot
If the image matrix is increased and the pixel size is decreased to fill the matrix, what
is the effect on spatial resolution?
a. resolution increases
b. resolution decreases
c. resolution remains the same
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resolution increases
,A 33 year old radiation worker would have a cumulative dose limit of:
a. 5 rem
b. 10 rem
c. 20 rem
d. 33 rem
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33 rem
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
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in the photostimulable phosphor
To take advantage of the anode heel effect when making a radiograph of the femur in
recumbent anteroposterior projection on a 35 x 43 cm image receptor (IR) at a 40-
inch source-image distance (SID), the patient should be placed so that the:
a. head is toward the anode end of the tube
b. head is toward the cathode end of the tube
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, head is toward the cathode end of the tube
Radiation produced by the photoelectric effect is called:
a. scattered radiation
b. compton effect
c. secondary radiation
d. coherent scattering
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secondary radiation
process in which detectors convert x-ray energy directly into an electric signal
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direct conversion
Scattered radiation affects the radiographic image by causing:
1. fog
2. reduced contrast
3. reduced recorded detail
a. 1 and 2
b. 1 and 3
c. 2 and 3
d. 1, 2, and 3
a. voxel
b. matrix
c. algorithm
d. byte
Give this one a try later!
matrix
During CR imaging plate processing, when the laser frees trapped electrons allowing
them to return to a lower energy state, what color of light photon is released?
a. red-orange
,b. ultraviolet
c. blue-purple
d. green-yellow
Give this one a try later!
blue-purple
Image sharpness is determined by the:
a. size of the electron stream
b. size of the actual focal spot
c. size of the effective focal spot
d. speed of rotation
Give this one a try later!
size of the effective focal spot
If the image matrix is increased and the pixel size is decreased to fill the matrix, what
is the effect on spatial resolution?
a. resolution increases
b. resolution decreases
c. resolution remains the same
Give this one a try later!
resolution increases
,A 33 year old radiation worker would have a cumulative dose limit of:
a. 5 rem
b. 10 rem
c. 20 rem
d. 33 rem
Give this one a try later!
33 rem
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
Give this one a try later!
in the photostimulable phosphor
To take advantage of the anode heel effect when making a radiograph of the femur in
recumbent anteroposterior projection on a 35 x 43 cm image receptor (IR) at a 40-
inch source-image distance (SID), the patient should be placed so that the:
a. head is toward the anode end of the tube
b. head is toward the cathode end of the tube
Give this one a try later!
, head is toward the cathode end of the tube
Radiation produced by the photoelectric effect is called:
a. scattered radiation
b. compton effect
c. secondary radiation
d. coherent scattering
Give this one a try later!
secondary radiation
process in which detectors convert x-ray energy directly into an electric signal
Give this one a try later!
direct conversion
Scattered radiation affects the radiographic image by causing:
1. fog
2. reduced contrast
3. reduced recorded detail
a. 1 and 2
b. 1 and 3
c. 2 and 3
d. 1, 2, and 3
