The overall ability of the image intensifier to make the image brighter is the

brightness gain

The __________ is bonded directly to the input phospher.

photocathode

The conversion factor is a(n) ________ term for brightness gain and is typically approximately ______ of the brightness gain value.

newer; 1%

When the camera tube's electron stream travels across the target, if there is light present

electrons are transmitted

Typical fluroscopic systems have spatial resolution capabilities in the range of

4-6 Lp/mm

If a 30/23/15 cm image intensifier is operated in the 23-cm mode, the fluroscopic image will be magnified by a factor of

1.3

This part of the image intensifier is made of cesium iodide

input phosphor

A face plate, signal plate, and target are all components of the

camera tube

Which of the following accurately shows the energy sequence during fluroscopy?

x-rays to light to electrons to light

The potential difference across the image intensifier is approximately

25kv

Distortion of the fluroscopic image that appears as unequal magnification is

pincushion appearance

The diameter of the output phosphor is approximately

2.5 cm

A disadvantage of using magnification mode during fluoroscopy is

the patient receives additional dose

________ imaging is accomplished with fluoroscopy as opposed to radiography

Dynamic

The conventional method for viewing the fluroscopic image is by

using a television monitor

The electrostic focusing lenses have a _______ charge

negative

A loss of brightness around the edge of the fluroscopic image caused by the curve of the photocathode is

vignetting

In reference to image intensification, the function that adjusts and maintains the overall image density and contrast during the fluroscopic procedure is

ABC

Increasing the mA is the way to correct a fluroscopic image that has

noise

The formula for minification gain is

minification gain=input phosphor diameter2/output phosphor diameter2

The input phosphor is ________ than the output phosphor

larger

Magnification of the fluorosopic image results in improved

spatial resolution

The commercial fluroscope was developed by

Edison

The ________ absorbs x-rays and emits light

input phosphor

________ is measured in cd/m2/mR/s

Conversion Factor

This part of the image intensifier is made of zinc cadmium sulfide

output phosphor

If the input phosphor measures 30 cm and the output phosphor measures 2.5 cm, what is the minification gain?

144

Before the image intensifier, the fluoroscopist may have worn ______ goggles to make it easier to see the dim fluroscopic image

red

The formula for brightness gain is

brightness gain= minification gain x flux gain

This part of the image intensifier absorbs light and produces electrons

photocathode

The image intensifier improved fluroscopy by

A and C (making the image brighter and indirect viewing of the image)

In fluoroscopy, shape distortion is caused by

the curved shape of the photocathode

Each capacitor in a CCD represents a(n)

pixel

The gain related to the decrease in size from the input to the output phosphor is the

minification gain

The original fluoroscopic image was very

dim

The _______ is located very close to the output phosphor.

accelerating anode

When operated in magnification mode, the electrostatic lenses have ______ of a negative charge.

more

The ratio of the number of light photons at the output phosphor as compared with the input phosphor is the

flux gain

The image intensifier was introduced in the

1950s

This part of the image intensifier is made of cesium and antimony compounds

photocathode

The formula to determine the amount of magnification created when in magnification mode, the formula is

MF= full size input phosphor/selected input phosphor

The image intensifier is located

inside the fluoro tower

When the electron beam in the camera travels back and forth across, from top to bottom, it is moving in a ______ pattern.

raster

The CCDs electric charge from the capacitors is sent to the

television monitor

Photoemission occurs at the

photocathode

The ________ is (are) found along the entire length of the image intensifier

electrostatic focusing lenses

Vidicon refers to a type of

camera tube

Semiconductor capacitors are components of the

CCD

The _______ absorbs electrons and emits light

output phosphor

The diameter of the input phosphor typically measures between

15-30 cm