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RAD 107 EXAM 3

QuestionAnswer
The ____________ in the image intensifier emits electrons when it is stimulated by light photons. photocathode
With image intensification the light level is raised to ___________ vision. photopic
The number of light photons emitted within the image intensifier is ____________ to the amount of x-ray photons exiting the patient. directly proportional
The input phosphor converts _________ to _________. xrays to light
Image intensified fluoroscopy is performed at illumination levels similar to ________. radiograph viewing
Fluoroscopy was developed so that radiologists could view ______________ images. dynamic
The capability of an image intensifier to increase the illumination level of the image is called its _____________________. brightness gain
The ratio of x-rays incident on the input phosphor to light photons exiting the output phosphor is called _______ gain. flux
Viewing the fluoroscopic image in magnification mode increases _____________. contrast resolution and patient dose
The time-interval delay mode is principally used in ___________ imaging. cardiac
In mask mode, the ________ image is shown on monitor B, and the ________ image is shown on monitor A. mask and subtracted
Fluoroscopy for an air contrast barium enema is generally done at _____ kVp. 80-90
Brightness gain is typically in the range of ____________. 5000-30,000
Digital fluoroscopy energy subtraction has less ___________ than temporal subtraction. motion artifact
Automatic brightness control (ABC) maintains the brightness of the image by varying ___________________. kVp and mA
The combination of temporal and energy subtraction techniques is called _________. hybrid subtraction
Created by: rbats
 

 



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