HESI RADIOGRAPHY LATEST
PRACTICE TEST 1
What is the term for the adjustment of image brightness, regardless of
exposure received?
A. Detective quantum efficiency (DQE).
B. Automatic brightness control (ABC).
C. Rescaling.
D. Dose area product (DAP). - ANSWERS-C. Rescaling.
Rescaling is the adjustment of digital data to a preset brightness
depending on the body part selected.
Why should computed radiography (CR) image receptors (IR) be erased
if they haven't been used?
A. Ensure dropout artifacts do not occur.
B. Eliminate phantom artifacts.
C. Remove fog from background radiation.
D. Prevent a Moire effect. - ANSWERS-C. Remove fog from
background radiation.
END OF
PAGE
1
, HESI RADIOGRAPHY LATEST
PRACTICE TEST 1
If IRs haven't been used, they should be erased due to fogging from
background radiation.
When using film-screen technology, how are the required milliampere-
seconds (mAs), contrast, and patient dose affected as the grid ratio
changes from 6:1 to 12:1?
A. Decreased mAs, decreased contrast, and decreased patient dose.
B. Decreased mAs, increased contrast, and decreased patient dose.
C. Increased mAs, decreased contrast, and increased patient dose.
D. Increased mAs, decreased contrast, and increased patient dose. -
ANSWERS-D. Increased mAs, decreased contrast, and increased patient
dose.
As grid ratio increases, an increase in mAs is needed to maintain
density. Increased contrast and increased patient dose will also be noted.
Without changing any other factors, which effect is caused by
decreasing the field size from 14X17 inches to 8X10 inches?
END OF
PAGE
2
, HESI RADIOGRAPHY LATEST
PRACTICE TEST 1
A. Decrease x-ray penetration of the part.
B. Increase x-ray penetration of the part.
C. Increase in the amount of scatter radiation within the part.
D. Decrease in the amount of scatter radiation within the part. -
ANSWERS-D. Decrease in the amount of scatter radiation within the
part.
Reducing the size of the field limits the amount of scatter produced.
Increasing field size increases the amount of scatter.
Which pathologic condition requires a reduction in exposure factors to
produce an acceptable image?
A. Emphysema
B. Late stage Paget's disease
C. Congestive heart failure
D. Atelectasis - ANSWERS-A. Emphysema
END OF
PAGE
3
, HESI RADIOGRAPHY LATEST
PRACTICE TEST 1
Emphysema is considered a destructive disease which requires a
reduction in exposure factors.
When film-screen technology is used, which kilovolts-peak (kVp)
setting produces the best scale of contrast for imaging ribs?
A. 100 kVp
B. 90 kVp
C. 80 kVp
D. 70 kVp - ANSWERS-D. 70 kVp
The lowest kVp of 70 provides the shortest scale of contrast.
Why should a radiographer routinely use a small focal spot when
imaging extremities?
A. Decrease in contrast.
B. Increase in recorded detail.
C. Decrease in patient dose.
END OF
PAGE
4
PRACTICE TEST 1
What is the term for the adjustment of image brightness, regardless of
exposure received?
A. Detective quantum efficiency (DQE).
B. Automatic brightness control (ABC).
C. Rescaling.
D. Dose area product (DAP). - ANSWERS-C. Rescaling.
Rescaling is the adjustment of digital data to a preset brightness
depending on the body part selected.
Why should computed radiography (CR) image receptors (IR) be erased
if they haven't been used?
A. Ensure dropout artifacts do not occur.
B. Eliminate phantom artifacts.
C. Remove fog from background radiation.
D. Prevent a Moire effect. - ANSWERS-C. Remove fog from
background radiation.
END OF
PAGE
1
, HESI RADIOGRAPHY LATEST
PRACTICE TEST 1
If IRs haven't been used, they should be erased due to fogging from
background radiation.
When using film-screen technology, how are the required milliampere-
seconds (mAs), contrast, and patient dose affected as the grid ratio
changes from 6:1 to 12:1?
A. Decreased mAs, decreased contrast, and decreased patient dose.
B. Decreased mAs, increased contrast, and decreased patient dose.
C. Increased mAs, decreased contrast, and increased patient dose.
D. Increased mAs, decreased contrast, and increased patient dose. -
ANSWERS-D. Increased mAs, decreased contrast, and increased patient
dose.
As grid ratio increases, an increase in mAs is needed to maintain
density. Increased contrast and increased patient dose will also be noted.
Without changing any other factors, which effect is caused by
decreasing the field size from 14X17 inches to 8X10 inches?
END OF
PAGE
2
, HESI RADIOGRAPHY LATEST
PRACTICE TEST 1
A. Decrease x-ray penetration of the part.
B. Increase x-ray penetration of the part.
C. Increase in the amount of scatter radiation within the part.
D. Decrease in the amount of scatter radiation within the part. -
ANSWERS-D. Decrease in the amount of scatter radiation within the
part.
Reducing the size of the field limits the amount of scatter produced.
Increasing field size increases the amount of scatter.
Which pathologic condition requires a reduction in exposure factors to
produce an acceptable image?
A. Emphysema
B. Late stage Paget's disease
C. Congestive heart failure
D. Atelectasis - ANSWERS-A. Emphysema
END OF
PAGE
3
, HESI RADIOGRAPHY LATEST
PRACTICE TEST 1
Emphysema is considered a destructive disease which requires a
reduction in exposure factors.
When film-screen technology is used, which kilovolts-peak (kVp)
setting produces the best scale of contrast for imaging ribs?
A. 100 kVp
B. 90 kVp
C. 80 kVp
D. 70 kVp - ANSWERS-D. 70 kVp
The lowest kVp of 70 provides the shortest scale of contrast.
Why should a radiographer routinely use a small focal spot when
imaging extremities?
A. Decrease in contrast.
B. Increase in recorded detail.
C. Decrease in patient dose.
END OF
PAGE
4
