Test Bank For Quality Management in the Imaging Sciences
5th Edition By Jeffrey Papp 9780323261999 Chapter 1-15
Complete Guide .
The greatest enemy of record image detail is:
large focal spot.
part angle.
tube angle.
motion. - ANSWER: motion.
Which device has greater sensitivity to light and provides a higher SNR (signal-to-noise ratio) and
improved contrast resolution?
A TV camera
A charge coupled device
A TV camera and a charge coupled device have equal sensitivity to light, provide equal signal-to-noise
ratio, and equal contrast resolution
None of the above - ANSWER: A charge coupled device
When using an AEC system, what will happen once the predetermined amount of radiation is
transmitted?
The x-ray exposure will continue for approximately .05 seconds
The x-ray exposure will terminate
The image receptor will be overexposed
The image receptor will be underexposed - ANSWER: The x-ray exposure will terminate
Advantages of flat-panel digital fluoroscopy system include:
1. better contrast resolution
2. uniformly distortion-free images
3. high DQE - ANSWER: 1, 2, and 3
The magnitude of the signal differences in the remnant beam that results from the differing
absorption properties of the part describes
quantum noise.
subject contrast.
image contrast.
spatial resolution. - ANSWER: subject contrast.
Which primary exposure technique factor is directly proportionate to the image receptor exposure?
kVp
mAs
SID
Tube filtration - ANSWER: mAs
PSPs must be processed and read soon after exposure because signal loss (image fading) becomes
apparent after approximately
90 minutes.
eight hours.
one week.
, three months. - ANSWER: eight hours.
Which of the following are types of beam restrictors?
I. Cones (cylinder and flare)
II. Collimators
III. Aperture diaphragms - ANSWER: All of the above
With AEC, the area of interest must be placed directly over the selected detectors in order to avoid
which two of the following? (select the two that apply)
A. Overexposure
B. Underexposure
C. Decrease in contrast
D. Increase in contrast - ANSWER: A and B
Select the one incorrect statement below:
A. A primary display workstation is one that is used for image interpretation.
B. The higher/greater the bit depth in digital imaging, the lesser the number of gray shades.
C. Exposure field recognition errors usually occur from scattered radiation outside the VOI area, often
as a result of improper alignment of part, x-ray beam, and IP.
D. Direct digital systems have a fixed spatial resolution that is determined by TFT detector element
(DEL) size. - ANSWER: B. The higher/greater the bit depth in digital imaging, the lesser the number of
gray shades.
When using an AEC system, the backup time should be set at
100% of the expected exposure time
125% of the expected exposure time
150% of the expected exposure time
175% of the expected exposure time - ANSWER: 150% of the expected exposure time
What term is used to describe the numeric value representative of the exposure the IR receives in
digital radiography?
Exposure indicator
Window level
Window width
Pixel value - ANSWER: Exposure indicator
Manipulation of grey level values is associated with
lookup table and window width
window level and lookup table.
window level and edge enhancement.
window width and edge enhancement - ANSWER: lookup table and window width
A wider (increased) window width (select the two that apply)
A. decreases the range of densities
B. increases the image contrast
C. increases the range of densities
D. decreases the image contrast - ANSWER: C and D
5th Edition By Jeffrey Papp 9780323261999 Chapter 1-15
Complete Guide .
The greatest enemy of record image detail is:
large focal spot.
part angle.
tube angle.
motion. - ANSWER: motion.
Which device has greater sensitivity to light and provides a higher SNR (signal-to-noise ratio) and
improved contrast resolution?
A TV camera
A charge coupled device
A TV camera and a charge coupled device have equal sensitivity to light, provide equal signal-to-noise
ratio, and equal contrast resolution
None of the above - ANSWER: A charge coupled device
When using an AEC system, what will happen once the predetermined amount of radiation is
transmitted?
The x-ray exposure will continue for approximately .05 seconds
The x-ray exposure will terminate
The image receptor will be overexposed
The image receptor will be underexposed - ANSWER: The x-ray exposure will terminate
Advantages of flat-panel digital fluoroscopy system include:
1. better contrast resolution
2. uniformly distortion-free images
3. high DQE - ANSWER: 1, 2, and 3
The magnitude of the signal differences in the remnant beam that results from the differing
absorption properties of the part describes
quantum noise.
subject contrast.
image contrast.
spatial resolution. - ANSWER: subject contrast.
Which primary exposure technique factor is directly proportionate to the image receptor exposure?
kVp
mAs
SID
Tube filtration - ANSWER: mAs
PSPs must be processed and read soon after exposure because signal loss (image fading) becomes
apparent after approximately
90 minutes.
eight hours.
one week.
, three months. - ANSWER: eight hours.
Which of the following are types of beam restrictors?
I. Cones (cylinder and flare)
II. Collimators
III. Aperture diaphragms - ANSWER: All of the above
With AEC, the area of interest must be placed directly over the selected detectors in order to avoid
which two of the following? (select the two that apply)
A. Overexposure
B. Underexposure
C. Decrease in contrast
D. Increase in contrast - ANSWER: A and B
Select the one incorrect statement below:
A. A primary display workstation is one that is used for image interpretation.
B. The higher/greater the bit depth in digital imaging, the lesser the number of gray shades.
C. Exposure field recognition errors usually occur from scattered radiation outside the VOI area, often
as a result of improper alignment of part, x-ray beam, and IP.
D. Direct digital systems have a fixed spatial resolution that is determined by TFT detector element
(DEL) size. - ANSWER: B. The higher/greater the bit depth in digital imaging, the lesser the number of
gray shades.
When using an AEC system, the backup time should be set at
100% of the expected exposure time
125% of the expected exposure time
150% of the expected exposure time
175% of the expected exposure time - ANSWER: 150% of the expected exposure time
What term is used to describe the numeric value representative of the exposure the IR receives in
digital radiography?
Exposure indicator
Window level
Window width
Pixel value - ANSWER: Exposure indicator
Manipulation of grey level values is associated with
lookup table and window width
window level and lookup table.
window level and edge enhancement.
window width and edge enhancement - ANSWER: lookup table and window width
A wider (increased) window width (select the two that apply)
A. decreases the range of densities
B. increases the image contrast
C. increases the range of densities
D. decreases the image contrast - ANSWER: C and D
