Exam 15: Computed Radiography

The computed radiography image has _____.

The laser beam must be less than 100 nm in diameter in order to maintain _____.

With computed radiography the contrast is _____.

When switching from screen-film imaging to computed radiography,which step is eliminated?

The laser is one of the _____ features of the computed radiography reader.

Switching from screen-film imaging to computed radiography can _____ patient dose.

The 400 speed film-screen systems are still faster than computed radiography image receptors.

Europium is the _____ of the photostimulable phosphor.

A photostimulable phosphor in a metastable state will emit light _____. I. immediately II. when stimulated by light III. over time

Computed radiography screens respond to radiation with _____.

The output signal from the photostimulable phosphor plate is converted from analog to digital by the _____.

The photostimulable phosphor screen is handled in a _____.

The digital imaging plate can sit for some time after the erase cycle.

Computed radiography and screen-film imaging both have a(n)_____.

Spatial resolution,contrast resolution,noise,and artifacts are identical in screen-film imaging and computed radiography.

The principal source of noise in computed radiography is _____.

The computed radiography cassette is called a(n)_____ plate.

The computed radiography reader is made up of _____,_____,and _____ modules. I. mechanical II. chemical III. optical IV. computer

Following the laser stimulation of the photostimulable phosphor,the excited electrons are _____.

Computed radiography imaging produces _____ gray levels.