RADT 1085 Contrast Test Questions and Answers All Correct
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Course
RADT 1085
Institution
RADT 1085
RADT 1085 Contrast Test Questions and Answers All Correct
Which of the choices below does not increase contrast?
A. Increasing the amount of irradiated tissue
B. Decreasing filtration
C. Decreasing kVp
D. Increasing grid ratio - Answer-A. Increasing the amount of irradiated tissue
The ...
RADT 1085 Contrast Test Questions
and Answers All Correct
Which of the choices below does not increase contrast?
A. Increasing the amount of irradiated tissue
B. Decreasing filtration
C. Decreasing kVp
D. Increasing grid ratio - Answer-A. Increasing the amount of irradiated tissue
The concept of contrast as it is displayed on a soft-copy monitor for digital images is
described as
A. Window level
B. Window range
C. Contrast width
D. Dynamic range - Answer-D. Dynamic range
As kVp increases, the percentage of Compton interaction ___ and contrast___
A. Increases; increases
B. Increases; decreases
C. Decreases ; increases
D. Decreases; decreases - Answer-B. Increases ; decreases
When the tissue structure of the ankle joint is considered, the dramatic tissue
differences between the muscles and bones of the ankle produce? - Answer-High
subject contrast
A fluoroscopic examination that uses barium as a contrast material would typically
produce images with - Answer-Shirt scale contrast
The total amount of irradiated material is a function of ? - Answer-body part thickness
and area of exposure
Depending upon the kVp range, a visible change in contrast will not be seen unless kVp
is minimally changed - Answer-4-12%
In ordered to reduce patient entrance skin exposure, higher kVp exposures are a
consideration. It is important to remember that ? - Answer-kVp values that are too high
produce more scatter and reduce contrast
After completing a radiography using 27 mAs at 90 kVp, the image demonstrates
adequate overall density but an area that is under penetrated. In order to produce an
optimum image in term of contrast and penetration, the repeat image should be taken at
? - Answer-27 mAs and 100 kVp
, kVp controls the proportional relationship - Answer-Compton and photoelectric
interactions
What should you expect to occur with a decrease in kVp ? - Answer-more photoelectric
interactions
When digital imaging receptors are used, - Answer-an exposure at 90 kVp would
require a grid.
All of the following factors would affect radiographic contrast expect ?
A. Field size
B. Receptor characteristics
C. SID and OJD
D. Focal spot selection - Answer-D. Focal spot selection
A increase in xray beam filtration
A. Increases the number of Compton interactions
B. Reduces contrast
C. Increases the average photon energy
D. All of the above - Answer-D. All of the above
The spatial resolution of a radiographic image is visible because of ?
A. Sufficient contrast
B. Sufficient density
C. Window level
D. Both a and b - Answer-D. Both a and b
The difference between two adjacent densities is ?
A. Radiographic contrast
B. Quantum mottle
C. Recorded detail
D. Distortion - Answer-A. Radiographic contrast
A radiograph with few shades of gray exhibits ?
A.high contrast
B. Medium contrast
C. Long scale contrast
D. Low contrast - Answer-A. High contrast
Which type of radiograph provides the most information ?
A. Low density images
B. Low contrast images
C. High contrast images
D. An image with quantum mottle - Answer-B. Low contrast images
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