Test Bank for Radiographic Image Analysis 5th Edition Martensen Answers

Test Bank for Radiographic Image
Analysis 5th Edition Martensen
ANSWERS


1. The patient demographic requirements for radiographic
images include all of the following except:
a. patient and facility identification.
b. time and date.
c. birth date.
d. technologist's identification.
Answer: d. technologist's identification.
Rationale: Patient demographic information required on a
radiographic image includes patient identification, facility
identification, date, and time. The technologist's identification is
not a demographic requirement for the image itself, though it is
often included for quality assurance purposes.

2. Which of the following is true about image markers?

1. They are radiopaque.
2. They should be reversed before being placed on the IR.
3. They should be positioned as close to the median plane as
possible.
4. They will be magnified if positioned on the imaging table or
patient.
a. 1 only
b. 1 and 4 only

, c. 2 and 3 only
d. 4 only
Answer: b. 1 and 4 only.
Rationale: Image markers are radiopaque so they are visible
on the radiograph. They will also be magnified if placed on
the table or patient due to the object-to-image distance
(OID). Markers should not be reversed before placement, and
they should be placed at the edge of the collimated field, not
close to the median plane.

3. What is the marker placement for the projection of PA
cranium?
a. Laterally on the side being identified
b. Anteriorly, identifying the side positioned closer to the IR
c. Anywhere within the exposure field
d. Laterally, identifying the side situated closer to the IR
Answer: a. Laterally on the side being identified.
Rationale: For a PA projection of the cranium, the marker should
be placed laterally on the side being identified. This standard
placement ensures that the marker corresponds correctly to the
anatomical side without superimposing over critical structures.

4. What is the marker placement for the projection of PA
oblique vertebrae?
a. Laterally on the side being identified
b. Anteriorly, identifying the side positioned closer to the IR
c. Anywhere within the exposure field
d. Laterally, identifying the side situated closer to the IR
Answer: d. Laterally, identifying the side situated closer to the
IR.
Rationale: For a PA oblique projection of the vertebrae, the marker

, is placed laterally, identifying the side that is positioned closer to
the image receptor (IR). This is because the side closer to the IR is
the one being demonstrated in the oblique view.

5. What is the marker placement for the projection of lateral
vertebrae?
a. Laterally on the side being identified
b. Anteriorly, identifying the side positioned closer to the IR
c. Anywhere within exposure field
d. Laterally, identifying the side situated closer to the IR
Answer: b. Anteriorly, identifying the side positioned closer to
the IR.
Rationale: For a lateral projection of the vertebrae, the marker is
placed anteriorly, identifying the side that is positioned closer to
the IR. This placement is unique to lateral vertebral projections to
correctly indicate which side is down (closer to the IR).

6. 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 converter)
b. DAC (digital-to-analog converter)
c. LUT (lookup table)
d. workstation
Answer: a. ADC (analog-to-digital converter).
Rationale: In computed radiography (CR), the photomultiplier
tube (PMT) converts light into an electrical signal (analog). This
analog signal must be converted into digital data, which is
performed by the analog-to-digital converter (ADC).