Exam 25: Fluoroscopy

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

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

The image intensifier improved fluoroscopy by increasing image _________________.

What is the milliamperage used during fluoroscopy?

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

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

Television monitoring allows ________________ to be controlled electronically.

The input phosphor converts _________ to _________.

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

Fluoroscopy was developed so that radiologists could view ______________ images.

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

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

With image intensification the light level is raised to ___________ vision.

Viewing the fluoroscopic image in magnification mode increases _____________.

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

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

The ____________ in the image intensifier emits electrons when it is stimulated by light photons.

Electrons hit the _______________ after exiting the anode.

Brightness gain is typically in the range of ____________.

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