fluoro equipment Flashcards
Stationary fluoroscopy is what?
fluoroscopy room 
Mobile fluoroscopy is what? 
C- arm
with fluoro we don’t set the kvp or mas we use
automatic brightness control
-it regulates the KVP antennae for fluoroscopy, depending on the part being examined
maximum mA station for fluoroscopy
is 5 mA
Image intensifier in order 
- input phosphor
- Photo cathode
- Electrostatic lenses
- Anode
- Output
where is the image intensifier? 
in a stationary fluoroscopy room, it is above the patient

input phosphor
Made of cesium iodide
-takes remanent beam and converts x-ray photons into light photons
photo cathode
takes the light photons and convert them into electrons
-photo omission= emitting electrons from light source
-made of alloy of antimony compounds and cesium
electrostatic lenses
Focuses the electrons toward the anode 
anode
doughnut, shaped hole in the middle, -accelerates the electrons to send to output, phosphor
- made of tungsten
output phosphor
-Made of zinc cadmium sulfide
Converts the electrons into light photons 
Charge coupled device
- Converts light back to electrical signal, -collects electrical signal and send it to the ADC
-2 jobs!
analog to digital converter (ADC)
converts to digital signal 
Monitor
See image on the monitor screen 
in CR, DR and image intensifier
it is never converted back into x-ray photons don’t pick that answer!!!!!
Magnification mode
increases magnification electronically results in a smaller field of view
-decreased input phosphor size, - increases spatial, resolution, and contrast and increases Patient dose
-smaller input size = increased dose
15 cm phosphor size = increases dose
23 cm phosphor size= decrease dose
mag 1, mag 2, mag 3
mag 3 would increase the pt dose the most!
Think about the II as the wall Bucky
Do you want to get the II as close to the patient as possible to reduce OID when using C arm
increasing the SID
Moving the patient away from the x-ray source closer to the II reduces dose
-Decreases magnification
-Decreases OID from II
the maximum mA station for fluoro is what
5 mA
flat panel dectectors indirect conversion 
X-rays exit the patient
-cesium iodide centiliter convert x-rays delight,
- amorphous silicon photodiode converts light two electrons
-TFT collects electrical signal 
errors with fluoro
- Pincushion artifact
- Vignetting
- S shape distortion
pincushion artifact
the loss of shape at the edges of the fluoro image
vignetting
is a reduction of an images brightness or saturation towards the periphery compared to the image center
* see the most questions about
-look for circle
