Chapter 02: Visibility of Details
Martensen: Radiographic Image Analysis, 5th Edition
MULTIPLE CHOICE
1. The light collected and converted to an electrical signal by the photomultiplier tube (PMT) during CR image sampling is then sent to the to be digitized.
a. ADC (analog-to-digital con...
1. The light collected and converted to an electrical signal by the photomultiplier tube
(PMT) during CR image sampling is then sent to theto be digitized.
a.
ADC (analog-to-digital converter)
b.
DAC (digital-to-analog converter)
c.
LUT (lookup table)
d.
workstation
ANS: A
2. What is the location on a histogram graph of air/gas?
a.
Center
b.
Far right
c.
Left
d.
Right
ANS: D
3. What is the location on a histogram graph of background brightness?
a.
Center
b.
Far right
c.
Left
d.
Right
ANS: B
4. What is the location on a histogram graph of bone?
a.
Center
b.
Far right
c.
Left
d.
Right
ANS: C
5. What is the location on a histogram graph of contrast/metal?
a.
Center
b.
Far right
c.
Far left
d.
Right
ANS: C
6. What is the location on a histogram graph of fat?
a.
Center
b.
Far right
c.
Left
d.
Right
, COMPLETE TEST BANK FOR RADIOGRAPHIC IMAGE ANALYSIS 5TH EDITION MARTENSEN
ANS: D
7. What is the location on a histogram graph of soft tissue?
a.
Center
b.
Far right
c.
Left
d.
Right
ANS: A
8. All of the following may result in histogram analysis errors except
a.
unusual pathologic conditions.
b.
poor positioning.
c.
motion.
d.
alignment of the anatomic part with the IR.
ANS: C
9. All of the following are guidelines for producing optimal image histograms except
N U R S Y T E S T S . C O M
a.
choose the correct body part and projection from the workstation menu.
b.
leave minimal background in the exposure field through tight collimation.
c.
use the smallest possible IR and cover at least 50% of it.
d.
erase the imaging plate if the IR has not been used for a few days.
ANS: C
10. The exposure indicator number represents all of the following except the
a.
amount of light given off bNyUthReSiYmTagEinSgTpSla.teC. OM
b.
amount of exposure to the patient.
c.
amount of exposure to the imaging plate.
d.
measure of dose to the patient.
ANS: D
11. At what level is the exposure indicator reading taken on the VOI?
a.
At S1
b.
At S2
c.
One fourth of the distance between S1 and S2
d.
Halfway between S1 and S2
ANS: D
12. When is the examination or body part selected when using the DR system?
a.
After the radiation exposure
b.
Before the radiation exposure
c.
At any time during the radiation exposure
d.
This is not a required procedure.
ANS: B
13. Which of the following CR cassette sizes will provide the greatest recorded detail?
a.
8 10 inch
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