CALIFORNIA FLUOROSCOPY
TEST 2024/2025 ACTUAL
EXAM [A+ GRADED]
An image intensifiers photocathode causes ___ to be given off
in direct proportion
... [Show More] to the intensity of the fluorescent light:
a. remnant radiation
b. electrons
c. x-rays
d. light photons - ANS✔✔-electrons
The increase in effective brightness due to the size reduction of
the output image size is referred to as:
a. Total gain
b. Minification gain
c. Output gain
d. Electronic gain - ANS✔✔-b. Minification gain
In a TV camera, the proportional electron charge is converted
into a proportional voltage which is sent to the:
a. Camera control unit
b. Electron gun
c. TV monitor
d. Output phosphor - ANS✔✔-Camera control unit
The greatest limiting factor concerning resolution for
fluoroscopic systems is the:
a. Output phosphor
b. Video monitor
c. Input phosphor
d. TV camera - ANS✔✔-Video monitor
Since the Bucky tray cover is directly in line with the
fluoroscopists gonads, the opening must be automatically
covered with ___ equivalent material.
a. 2.5 mm aluminum
b. 2.5 mm lead
c. 0.25 mm aluminum
d. 0.25 mm lead - ANS✔✔-0.25 mm lead
What percentage of incident photons will emerge unaffected by
the patients tissues?
a. 50%
b. 10%
c. 1%
d. 5%
. - ANS✔✔-5%
The primary purpose of protective drapes or sliding panels is
to:
1. Reduce scatter to the patient
2. Reduce scatter to the operator
3. Reduce scatter to the image intensifier
4. Reduce radiation coming primarily from the patient -
ANS✔✔-2 and 4
The components of the closed-circuit television system are:
1. vidicon camera
2. imaging intensifier
3. camera control unit
4. television monitor - ANS✔✔-1, 3 and 4 only
For fluoroscopic installations, the primary barrier is considered
to be the:
1. Floor
2. Ceiling
3. Walls
4. Image intensifier assembly - ANS✔✔-4 only
The component in an image intensifier that regulates or
changes the amount of magnification in the virtual image is
the:
a. Accelerating anode
b. Electrostatic lens
c. Magnifying lens
d. Focusing cup
. - ANS✔✔-Electrostatic lens
Remnant, exit, or imaging forming radiation consists of:
1. Interacting photons
2. Non-interacting photons
3. Small-angle scattered photons
4. large-angle scattered photons - ANS✔✔-2 and 3
The mottle level of an image can be adjusted by:
1. changing mA
2. changing kVp
3. changing the exposure factors
4. increasing the number of available x-ray photons - ANS✔✔
All of the above
Why is it important to coordinate the video signal between the
TV camera and the TV monitor?
a. To amplify the video signal appropriately
b. To avoid unnecessary screen lag in the television picture
c. To avoid unnecessary flicker in the television picture
d. So that no exposure is made between frames - ANS✔✔-To
avoid unnecessary flicker in the television picture
How does the focal spot size of fluoroscopic x-ray tube differ
from a radiographic x-ray tube?
a. Often designed with a smaller focal spot
b. Often designed with a larger focal spot
c. No difference in focal spot size - ANS✔✔-Often designed
with a smaller focal spot
The best recorded resolution is obtained with use of:
a. Video tape recording
b. Spot films using conventional cassettes
c. Spot films using a spot film camera
d. Video disc recording - ANS✔✔-Spot films using conventional
cassettes
The total filtration used in fluoroscopic x-ray tubes operating
above 125 kVp must be a least:
a. 2.5 mm Al equivalent
b. 0.5 mm Al equivalent
c. 3.0 mm Al equivalent [Show Less]