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Little jerrys Physic

Radiational Physics Note cards

QuestionAnswer
Tomography is also known as ___ ___ ___? Body Section Radiography (Tomography ppt. pg. 1)
Planigraphy is looking at a specific __ in the body? Plane (Tomography ppt. pg. 2)
The fulcrum is the imaginary __ __ about which the tube film moves? Pivot Point (Tomography ppt. pg. 3)
The tomographic angle determines the __ of the tomographic cut? Thickness (Tomography ppt. pg. 4)
What colors does red goggles filter out? Blue & Green (Bushong pg. 349)
What does the iris of the eye control? Amount of light passing through the eye (Bushong pg. 348)
What happens when phosphor is hit by x-rays/energy? Glows (Bushong pg. 351)
What is night vision referred to as? Scotopic vision (Bushong pg. 348)
What gives all e⁻ the ability to travel the same distance to the Output phosphor? Curved IP & PC Input phosphor/Photocathode (Flouroscopy ppt. pg 8)
When x-rays hit the IP (Input phosphor) what is produced? Visible Light (Bushong pg. 350)
X-rays were initially discovered because of their ability to cause ___? Fluorescence (Flouroscopy ppt. pg. 1)
Which is better at detecting differences in brightness? Cones or Rods? Cones (ßushong pg. 348)
Fluoroscope was invented by __? Thomas Edison (Bushong pg. 347)
How long did it take for radiologist to dark adapt their eyes? 20-30 minutes (Bushong pg. 349)
The OP (output phosphor) produces ___ more light than the IP (Input phosphor)? 50x (Fluoroscopy ppt. pg. 9)
Describe the Brightness gain equation? BG = (MG)(FG) Brightness gain = Minification Gain x Flux gain (Bushong pg. 351)
What is the most popular trifield tube size? 25/17/12 cm (Bushong pg. 352)
Define Vignetting? Reduction in brightness at the periphery of the image (Bushong pg. 352)
Created by: FHCRAD