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adv img for fin 2

advanced imaging final 2 old quiz Qs

QuestionAnswer
What is the lead equivalency of the II in flouro? 2.0 mm pb eq.
A “Stepping” unit does what? allows the x-ray tube to follow a bolus of contrast in CVIT
In what part of the II is the electronic image formed? photocathode
In tomo, where is the fulcrum located? focal plane
A fluoroscopic TV operates at what rate? 30 frames/sec
What element maintains constant image brightness? ABS
Air kerma rate for flouro? < 10 R/min
Normal range of flouro tube currents .5 – 5 mA
Minimum SSD in stationary flouro: 15”
When the II operates at a smaller FOV, what happens to pt. dose and minification gain? pt dose is increased, minification gain is decreased.
The input phosphor of the II is composed of what? cesium iodide
In flouro leakage radiation shall be: < 100 mR/hr at 1m at max
Visual acuity is used for: fine detail
Zonography uses what type of tomo angle? 5 degrees
The e- beam in a TV camera tube is produced how? thermionic emission
Moving the II closer to the pt. in flouro does what to pt. dose and image quality? decreased pt dose, improved quality
Created by: annaluz87
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