fluoro

Dark Adaptation

Adjustment of eyesight in low light conditions.

Vignetting

Edge distortion from concave input screen.

Carriage Arm

Supports equipment over the x-ray table.

The image intensifier tube is designed to electronically amplify of an image.

brightness

Fluoroscopy

Dynamic examination for active diagnosis.

Getter

Ion pump removing ions during imaging process.

What should shut to viewing image size when magnifying?

Collimation

the greater voltage applied to the electrostatic lenses the _ the acceleration.

greater

Typical X-ray Tube mA

Operates between 50-1200 mA.

Electrostatic Lenses

Accelerate and focus electrons in imaging.

most fluoro systems are capable of bit processing.

8

Flat Panel Detector Benefits

Reduction in C-arm size and weight

improve positioning flexibilty

non vignetting/ pin cushioning

decrease pt dose

improve

Multiple Detector System

Involves image capture, readout of data, and clearing of DELS for next exposure

Table Top Exposure Limit should not exceed

10 R/min

Input Fluorescent Screen Shape

concave

Interrogation Time

Time for generator to reach KVP and MAS.

Flux Gain

Increase in light photons from conversion efficiency.

magnification of an image viewed with a screen diameter of 12 is using a 5 diameter area of magnification would be?

high power generator

pulse progressive mode is achieved by using high power generators

Quantum Mottle Reduction

Increase mA

electrons that strike the screen are converted into what color light photons?

green

Total Brightness Gain

measurement of the increase in image intensity achieved by an II tube

Shape Distortion

distortion that is caused by geometric problems in the shape of the II tube

Lead Equivalent for Radiologists and techs

0.5mm Pb/eq

Fluoro Alarm Time

5 minutes.

II tubes can be designed to the image electronically by changing voltage on the lenses.

magnify

Minification Gain

increase in brightness of intensity, not in quality of the number of photons

Automatic Brightness Control

Maintains image brightness and contrast.

highest energy scatter at greater than degrees angle to the incident beam

90 degrees

Bucky Slot Lead Coverage

Covered by 0.25mm Pb for safety.

Total Brightness Gain

Minification gain x flux gain =

(AGC)

automatic gain control

Contrast is controlled by increasing _ of the video signal

amplitude

Brightness Gain deteriates as much as ____ % per year as input and out put screens age

10%

Minification Gain Calculation

(Input diameter^2)/(Output diameter^2) =