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Fluoroscopy Exam Questions With 100% Correct Answers!!
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Fluoroscopy Exam Questions With 100% Correct Answers!!
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Name: Score:163 Multiple choice questions
Term 1 of 163
How much flux gain does a typical image intensifier have?
No
Vidicon
mA
50
Term 2 of 163
Increased noise has an inverse relationship to
resolution
contrast
compare
distortion
Term 3 of 163
What 3 things does magnification mode result in?
1.) Coherent scatter, aka Thomspon or classical, 2.) Compton effect, 3.) Photoelectric effect,
4.) Pair production, and 5.) Photodisintegration.
It is designed to electronically amplify the brightness of an image.
T.V. camera tube
1.) Better contrast resolution, 2.) better spatial resolution, and 3.) higher pt dose.
,Term 4 of 163
Which structures in the human eye are responsible for the sensation of vision?
Iris and pupil. iris = controls light entry; pupil = adjusts size based on light.
Retina and sclera. retina = detects motion; sclera = provides structure.
Cornea and lens. cornea = protects the eye; lens = focuses light.
Rods and cones. Rods = night vision (scotopic); colorblind. Cones = daylight vision
(photopic); can perceive color.
Term 5 of 163
At what stage of image intensified fluoroscopy is the number of image forming photons lowest?
Leaving the photocathode
Entering the input phosphor
Conversion
Distortion
Definition 6 of 163
Underframing
Which light wavelengths are rods most sensitive to?
Which factors produce a brighter image at the output phosphor?
CINE framing due to poor optical coupling
Dark adaptation for the eye takes how long
,Definition 7 of 163
quantum sink.
The further away the Focal Point is from the output phosphor, the more ________ the image is.
The misrepresentation of object size and shape on a radiograph
Instrument used to expose film to precisely controlled steps of increasing light intensity is:
The point in the imaging chain where the fewest number of x-ray or light photons are used
to convey the signal is referred to as what.
Term 8 of 163
Which type of timer accuracy test is performed for three phase x-ray units?
Synchronous spinning top test which shows a solid arc exposure in portion of a circle and
measured in degrees.
Digital imaging test that analyzes pixel density.
Random exposure test using a stationary film.
Continuous wave test that measures sound frequency.
Term 9 of 163
What are 2 types of fluoro recording systems?
Pair production.
Signal plate.
Blue and green.
Plumbicon and vidicon.
, Term 10 of 163
What are 3 advantages of tv monitoring systems?
Synchronous spinning top test which shows a solid arc exposure in portion of a circle and
measured in degrees.
the emission of electrons from an illuminated surface.
1.) Brightness and contrast adjusted electronically, 2.) several people can observe at one
time, and 3.) monitors can be placed outside the area for others to view
The thickness of a specified substance which reduces the exposure rate of the primary
beam by one half
Term 11 of 163
What are the 2 principle components of a fluoroscope?
Blue and green.
Tube and fluorescent screen.
5000 light photons.
The more light that hits the photocathode, the more electrons are produced.
Term 12 of 163
How many light photons are emitted for each absorbed x-ray photon?
7500 light photons.
1000 light photons.
5000 light photons.
2500 light photons.
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