Fluoroscopy Study Questions with Correct Answers
Which comes first in image intensified fluoroscopy - Answer- Cesium Iodide screen
If the radiologist out worked with requested a TV image with sharp detail, what type of TV camera would you recommend purchasing - Answer- Vidicon
Which componen...
Fluoroscopy Study Questions with
Correct Answers
Which comes first in image intensified fluoroscopy - Answer- Cesium Iodide screen
If the radiologist out worked with requested a TV image with sharp detail, what type of
TV camera would you recommend purchasing - Answer- Vidicon
Which component of the television monitor transfers the video signal into a visible
image - Answer- Fluorescent screen
How is the electron beam in a television camera tube produced - Answer- Thermionic
emission
When using a 25/17/12 image intensifier tube, which of the following is true? - Answer-
The field of view is largest in the 25 cm mode
When using a multi-focus image intensifier tube in the magnification mode - Answer-
Resolution is improved
What happens when a multi-focus image intensifier tube is operated in the magnification
mode - Answer- The focal point is closer to the input screen
Automatic brightness control is designed to compensate for changes in which of the
following? - Answer- Patient body habitus
The single function of an AEC is to eliminate the need for the radiographer to set an -
Answer- Exposure time
The backup time should be set at ___________ percent of the anticipated manual
exposure time - Answer- 150
During fluoroscopy the SOD on a fixed unit cannot be less than - Answer- 15 inches
Electrostatic lenses are used to accelerate and focus - Answer- Electrons
All of the following are common post-processing features with digital fluoroscopy
EXCEPT - Answer- Last image hold
During fluoroscopy the principal source of radiation exposure to personnel in the room is
the - Answer- Patient
, When using automatic brightness control it is important to remember that - Answer- A
dark video image indicates photon starvation to the receptor
__________ fluoroscopy is when the radiologist periodically activates the x-ray beam
instead of using a continuous beam which reduces the exposure to the patient -
Answer- Intermittent
21 CFR states that fluoroscopic equipment manufactured after 2006 shall display -
Answer- Air kerma rate, cumulative air kerma, and updated every 5 seconds
Flat panel digital detectors used for fluoroscopy use - Answer- Amorphous silicon,
cesium iodide scintillator, Tft technology
In a fluoroscopy system the X-ray tube and image receptor must be interlocked in order
to enable fluoro. This classifies the image receptor as the - Answer- Primary barrier
Mobile fluoroscopic systems are different from fixed systems in that they - Answer-
Have minimum SOD of 12 inches
All of the following are true of the fluoroscopic lead apron drape EXCEPT - Answer- It
covers the Bucky slot in the table
Radiographers should move __________ away from the patient prior to making an
exposure - Answer- 2 yards
During mobile radiography the radiographer must achieve maximum distance primarily
from the - Answer- Patient
If a chest radiograph requires 4 mAs at 72", the new mAs to use at 56" would be -
Answer- 2.4
____________ is the measurement of the increase in light photons due to the
conversion efficiency of the output screen - Answer- Flux gain
Which of the following describes the fluoroscopic system designed to maintain a
constant image brightness - Answer- Automatic brightness control (ABC)
Fluoroscopy mA range is - Answer- 0.5-5.0
During fluoroscopy the SOD cannot be less than how many inches on a mobile unit -
Answer- 12
The input screen absorbs ______________ and emits _______________ - Answer- X-
ray photons, light photons
Electrostatic lenses are used to accelerate and focus - Answer- Electrons
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