Chapter 9

The visibility of anatomic structures in a radiographic image is determined by

Brightness, density, and contrast

The amount of luminance (light emission) of a display monitor is

Brightness

The amount of overall blackness on the processed image is

Density

An area of decreased brightness visualized on a computer monitor has ________ density on a film image

Increased

The variation in brightness and density on digital or film imaging is

Contrast

A digital image with increased distortion may be due to

Increased CR angulation and decreased SID

A digital image with decreased spatial resolution may be due to

Decreased SID and increased CR angulation

A digital image with higher contrast may be due to

Decreased kVp, increased grid ratio, and decreased patient thickness

A film-screen image with lower contrast may be due to

Increased kVp and increased patient thickness

A film-screen image with increased density may be due to

Decreased SID and increased film/screen speed

A film-screen image with increased recorded detail may be due to

Decreased OID, decreased focal spot size, and decreased film/screen speed

(in quiz: increased OID)

A film-screen image with decreased distortion may be due to

Decreased patient thickness and increased SID

What changes would produce a digital image with decreased brightness

No changes

Changing from 40-in SID to 72-in SID using a digital imaging system results in

No change; no change

Changing from 8x10 collimation to 14x17 collimation using a digital imaging system results in

No change; decreased