CA Fluoro Test Questions With Complete Solutions
An image intensifiers photocathode causes ___ to be given off in
direct proportion to the intensity of the fluorescent light Correct
Answers Electrons
Brightness gain can degrade as much as ___ per year due to the
"aging" of the input and output screen phosphors Correct
Answers 10%
Brightness gain formula Correct Answers Minification gain X
flux gain
By definition, the increase in brightness or intensity due to
minification gain is: Correct Answers The compression of
electrons produced by the input screen onto the output phosphor
By selecting ___ one can achieve obtain maximum differential
absorption of the tissues in order to produce a high-quality
fluoroscopic image Correct Answers Peak kilovolts
Concerning the "f-number" of an optical lens, the greater the f-
number: Correct Answers 1. The smaller the size of the aperture
2. The less light is available to form the image
Contrast ratios for modern image intensifiers typically: Correct
Answers Exceeds 15:1
During a fluoroscopic exam, the main source of scattered
radiation is produced from Correct Answers The Patient
, Excessive lighting in the fluoroscopy room: Correct Answers
May result in increasing the technical operating factors
Fluoroscopic magnification is made possible by varying the
voltage applied to the Correct Answers Electrostatic Lenses
Fluoroscopic protective curtains must be made of at least ___
equivalent material. Correct Answers 0.25mm lb
Fluoroscopy is defined as a radiological examination utilizing
___ for observation of the transient image Correct Answers
Fluoroescence
For fluoroscopic installations, the primary barrier is considered
to be the Correct Answers Image intensifier assembly
How does the focal spot size of fluoroscopic x-ray tube differ
from a radiographic x-ray tube? Correct Answers Often
designed with a smaller focal spot
How is an image intensifier system constructed to ensure the
entire useful beam is intercepted when energized Correct
Answers 1. Use of a c-arm
2. Alignment sensor switches
4. Physical interlock switch
How will the fluoroscopic image brightness be affected as the
fluoroscopic field of view (FOV) is reduced with tighter
collimation? Correct Answers Image brightness will not change
An image intensifiers photocathode causes ___ to be given off in
direct proportion to the intensity of the fluorescent light Correct
Answers Electrons
Brightness gain can degrade as much as ___ per year due to the
"aging" of the input and output screen phosphors Correct
Answers 10%
Brightness gain formula Correct Answers Minification gain X
flux gain
By definition, the increase in brightness or intensity due to
minification gain is: Correct Answers The compression of
electrons produced by the input screen onto the output phosphor
By selecting ___ one can achieve obtain maximum differential
absorption of the tissues in order to produce a high-quality
fluoroscopic image Correct Answers Peak kilovolts
Concerning the "f-number" of an optical lens, the greater the f-
number: Correct Answers 1. The smaller the size of the aperture
2. The less light is available to form the image
Contrast ratios for modern image intensifiers typically: Correct
Answers Exceeds 15:1
During a fluoroscopic exam, the main source of scattered
radiation is produced from Correct Answers The Patient
, Excessive lighting in the fluoroscopy room: Correct Answers
May result in increasing the technical operating factors
Fluoroscopic magnification is made possible by varying the
voltage applied to the Correct Answers Electrostatic Lenses
Fluoroscopic protective curtains must be made of at least ___
equivalent material. Correct Answers 0.25mm lb
Fluoroscopy is defined as a radiological examination utilizing
___ for observation of the transient image Correct Answers
Fluoroescence
For fluoroscopic installations, the primary barrier is considered
to be the Correct Answers Image intensifier assembly
How does the focal spot size of fluoroscopic x-ray tube differ
from a radiographic x-ray tube? Correct Answers Often
designed with a smaller focal spot
How is an image intensifier system constructed to ensure the
entire useful beam is intercepted when energized Correct
Answers 1. Use of a c-arm
2. Alignment sensor switches
4. Physical interlock switch
How will the fluoroscopic image brightness be affected as the
fluoroscopic field of view (FOV) is reduced with tighter
collimation? Correct Answers Image brightness will not change
