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Fluoroscopy Exam Questions and Answers- Updated 2024
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Fluoroscopy Exam Questions and Answers- Updated 2024 What is the maximum mA used when operating fluoroscopy? - Answer-The maximum mA used during fluoroscopy is 5mA or less. Despite lower mA, the patient dose is higher during fluoroscopy than it is in radiographic exams because the x-ray beam e...

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  • October 16, 2024
  • 36
  • 2024/2025
  • Exam (elaborations)
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  • fluoroscopy exam questions and answers updated 20

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  • Fluoroscopy
  • Fluoroscopy

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EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024




Fluoroscopy Exam Questions and
Answers- Updated 2024

What is the maximum mA used when operating fluoroscopy? - Answer✔✔-The maximum mA

used during fluoroscopy is 5mA or less.




Despite lower mA, the patient dose is higher during fluoroscopy than it is in radiographic exams

because the x-ray beam exposes the patient for a considerably longer period of time.


What structure of the eye is responsible for scotopic vision? - Answer✔✔-Rods cell (almost

entirely responsible for night vision) more sensitive than cone cells.


Personnel wearing protective lead aprons during a procedure where the minimum exposure

rate is 5mR/hr must contain the equivalent of what


thickness in lead? - Answer✔✔-.25mm lead equivalent (according to NCRP)


Total Brightness Gain is determined by which 2 factors? - Answer✔✔-It is determined by

minification gain & flux gain.




Total brightness gain is a measurement of the increase in image intensity achieved by an image

intensification tube.

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,EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024


Cones are used primarily for daylight vision. This type of vision is referred to as? - Answer✔✔-

Photopic vision


What is the minimum filtration required for fluoroscopy machines? - Answer✔✔-2.5mm

Aluminum or Aluminum equivalent


In DF, spatial resolution is determined by what 2 components? - Answer✔✔-In DF, spatial

resolution is determined both by image matrix and by the size of the image intensifier.




Spatial resolution is limited by pixel size.


What is the formula used to determine brightness gain? - Answer✔✔-Minification Gain X Flux

Gain


What is the Input Phosphor is made up of? - Answer✔✔-Cesium Iodide (CsI)


What does the Image Intensifier of a fluoroscopic machine do? - Answer✔✔-The Image

Intensifier raises the intensity of available light into the cone-vision region, where visual acuity is

the greatest.


What is NOT a non-stochastic effect? - Answer✔✔-They do not cause genetic effects (cancer)




Non-stochastic effects are biologic somatic effects that exhibit a threshold dose below which the

effect does not occur.



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,EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024


Stochastic Effects are? - Answer✔✔-Stochastic effects are effects that occur by chance and

which may occur without a threshold level of dose.




The probability is proportional to the dose and the severity is independent of


the dose.




In the context of radiation protection, the main stochastic effect is cancer.


Radiographs and image intensified fluoroscopic images are best visualized under what

illumination levels? - Answer✔✔-under illumination levels of 10 to 1000ml (milliamberts)


Which part of the eye behaves like a diaphragm of a photographic camera to control the

amount of light emitted to the eye? - Answer✔✔-The Iris




The iris is located between the cornea & the


lens of the eye.




During low light conditions, the iris dilates & allows for more light to enter.


What is vignetting? - Answer✔✔-Vignetting is the loss of brightness at the edge of the image.

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, EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024


The following factors influence dose rate at a table top fluoroscopic machine: - Answer✔✔-mA


kVp


Collimation


Filtration


Exposure time


Target panel distance


Fovea Centralis is? - Answer✔✔-Fovea Centralis are cones concentrated at the center of the

retina.


What is the magnification for an image viewed with a 9" image intensifier tube that has used a

5" diameter area during magnification? - Answer✔✔-Magnification= input screen / diameter of

input screen used during magnification.




9/5




magnification = 1.8


The Fluoroscopic Automatic Brightness Control (ABC) should be evaluated for quality control

when? - Answer✔✔-Anually




Page 4/36

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