Exam 25: Fluoroscopy

The number of light photons emitted within the image intensifier is _____ to the amount of x-ray photons exiting the patient.

Image intensified fluoroscopy is performed at illumination levels similar to _____.

Electrons hit the _____ after exiting the anode.

The _____ is the product of the minification gain and the flux gain.

The kinetic energy of photoelectrons in the image intensifier is greatly increased by the _____.

The input phosphor converts _____ to _____.

Automatic brightness control (ABC)maintains the brightness of the image by varying _____.

Visual acuity in the eye is greatest at the _____,where _____ are concentrated.

The ratio of x-rays incident on the input phosphor to light photons exiting the output phosphor is called _____ gain.

The output phosphor of the image intensifier is composed of _____.

The image intensifier improved fluoroscopy by increasing image _____.

Viewing the fluoroscopic image in magnification mode increases _____.

Television monitoring allows _____ to be controlled electronically.

An image intensifier tube is identified by the diameter of its _____.

Fluoroscopy was developed so that radiologists could view _____ images.

What is the milliamperage used during fluoroscopy?

Fluoroscopy for an air contrast barium enema is generally done at _____ kVp.

The ability of the eye to detect differences in brightness levels is termed _____.

Light produced at the output phosphor of the image intensifier has been increased _____ times in intensity.

X-rays that exit the patient and enter the image intensifier first interact with the _____.