Fluoroscopy Exam Prep Questions with 100%
Correct Answers
luminsence
emission of light due to outside stimulation
fluorescence
light during stimulation
phosphorescence
light that continues to be emitted after stimulation
fluoroscopy
________: process of using a fluoroscope for examining internal movement of structures and
fluids.
fluorescence, thomas edison
History
- __________: LEAD TO X-RAY DISCOVERY
- Roentgen - barium platinocyanide
- _____ ________ 1896 discovered the fluoroscope
- FILMS/TUBES WERE INFERIOR SO -FLUOROSCOPY MORE USEFUL THAN PLAIN
FILM
scoptic
,conventional fluro equipment used ______ vision - night vision most sensitive to green at about
555 nm
dark room
conventional fluoro required the use of the ______ _______ and rods because of the low screen
brightness: 5-75 LUX
cones
image intensified fluoro allowed use of _______ and screen 200-2000 LUX.
-high visual acuity, increase contrast resolution
-photopic: daylight vision; perceives color
input phosphor
______ ______: made of cesium iodide - converts x-rays into visible light. One x-ray photon
produces many light photons (1000-1500)
photocathode
__________- input phosphor light stimulates a layer of cesium
and antimony compounds to photoemit photoelectrons. The photocathode layer is bonded to the
input phosphor and has a
25,000 V negative potential w.r.t the anode. It takes many light photons to create one
photoelectron.
electrostatic lenses
Electron optics using ______ _______ focus photoelectrons on
the output phosphor which produces output light.
, minification, flux
Brightness gain = increase in brightness =
_______ GAIN
X
_____ GAIN
Normally 8000 - 25,000
Decreases with age & use
minification gain
________ ________: Gain due to the light energy being focused into a smaller area
input output
Minification gain =Diameter of ______ phosphor^2 / Diameter of _______ phosphor^2
flux gain, 50-75
______ _______: measurement of increase in light photons due to the conversion efficiency of
the output screen. IT DEALS ONLY WITH THE GAIN ACCOMPLISHED BY THE
PHOTOELECTRON TO LIGHT CONVERSION AT THE OUTPUT SCREEN. Typical values:
___-___.
output, input
Flux gain =Number of ______ light photons / Number of ______ photoelectrons
flux, minification
brightness gain = _______ gain/_______gain
Correct Answers
luminsence
emission of light due to outside stimulation
fluorescence
light during stimulation
phosphorescence
light that continues to be emitted after stimulation
fluoroscopy
________: process of using a fluoroscope for examining internal movement of structures and
fluids.
fluorescence, thomas edison
History
- __________: LEAD TO X-RAY DISCOVERY
- Roentgen - barium platinocyanide
- _____ ________ 1896 discovered the fluoroscope
- FILMS/TUBES WERE INFERIOR SO -FLUOROSCOPY MORE USEFUL THAN PLAIN
FILM
scoptic
,conventional fluro equipment used ______ vision - night vision most sensitive to green at about
555 nm
dark room
conventional fluoro required the use of the ______ _______ and rods because of the low screen
brightness: 5-75 LUX
cones
image intensified fluoro allowed use of _______ and screen 200-2000 LUX.
-high visual acuity, increase contrast resolution
-photopic: daylight vision; perceives color
input phosphor
______ ______: made of cesium iodide - converts x-rays into visible light. One x-ray photon
produces many light photons (1000-1500)
photocathode
__________- input phosphor light stimulates a layer of cesium
and antimony compounds to photoemit photoelectrons. The photocathode layer is bonded to the
input phosphor and has a
25,000 V negative potential w.r.t the anode. It takes many light photons to create one
photoelectron.
electrostatic lenses
Electron optics using ______ _______ focus photoelectrons on
the output phosphor which produces output light.
, minification, flux
Brightness gain = increase in brightness =
_______ GAIN
X
_____ GAIN
Normally 8000 - 25,000
Decreases with age & use
minification gain
________ ________: Gain due to the light energy being focused into a smaller area
input output
Minification gain =Diameter of ______ phosphor^2 / Diameter of _______ phosphor^2
flux gain, 50-75
______ _______: measurement of increase in light photons due to the conversion efficiency of
the output screen. IT DEALS ONLY WITH THE GAIN ACCOMPLISHED BY THE
PHOTOELECTRON TO LIGHT CONVERSION AT THE OUTPUT SCREEN. Typical values:
___-___.
output, input
Flux gain =Number of ______ light photons / Number of ______ photoelectrons
flux, minification
brightness gain = _______ gain/_______gain
