Question 1

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

Accepted Answer

Imaging characteristics (spatial resolution,contrast resolution,noise,and artifacts)in digital radiography are different from imaging characteristics in screen-film imaging.

Question 2

Computed radiography cassettes and film/screen cassettes can be used interchangeably with any x-ray imaging system.

Accepted Answer

Computed radiography cassettes and film/screen cassettes can be used interchangeably with any x-ray imaging system.

Question 3

Computed radiography screens respond to radiation with _____.
A) fluorescence
B) electron emission
C) photostimulable luminescence
D) biological phosphorescence

Accepted Answer

Computed radiography screens respond to radiation with photostimulable luminescence.

Question 4

A photostimulable phosphor in a metastable state will emit light _____.
I. immediately
II. when stimulated by light
III. over time
A) I
B) II
C) II & III
D) I, II & III

Accepted Answer

A photostimulable phosphor in a metastable state emits light immediately,when stimulated by light,and over time.

Question 5

The four steps of creating an image with computed radiography are _____.
A) metastable state, stimulate, read, and erase
B) erase, stimulate, metastable state, and read
C) read, erase, stimulate, and metastable state
D) metastable state, read, erase, and stimulate

Accepted Answer

The four steps of creating an image with computed radiography are metastable state,stimulate,read,and erase.

Question 6

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

Accepted Answer

Computed radiography image receptors are faster than 400 speed film-screen systems.

Question 7

The computed radiography cassette is called a(n)_____ plate.
A) optical
B) imaging
C) laser
D) thermoluminescent

Accepted Answer

The computed radiography cassette is called an imaging plate.

Question 8

Following the laser stimulation of the photostimulable phosphor,the excited electrons are _____.
A) completely stabilized
B) mostly stabilized
C) still excited
D) completely removed

Accepted Answer

Following the laser stimulation of the photostimulable phosphor,the electrons are mostly stabilized.

Question 9

With computed radiography the contrast is _____.
A) controlled by kVp
B) controlled by mAs
C) constant regardless of radiation exposure
D) impossible to change

Accepted Answer

With computed radiography the contrast is constant regardless of radiation exposure.

Question 10

Digital radiography was first introduced by _____.
A) GE in 1998
B) Fuji in 1981
C) Kodak in 1975
D) DuPont in 1965

Accepted Answer

Digital radiography was first introduced by Fuji in 1981.

Question 11

The photostimulable phosphor screen is handled in a _____.
A) reader
B) darkroom
C) film processor
D) film changer

Accepted Answer

The photostimulable phosphor screen is handled in a reader.

Question 12

Europium is the _____ of the photostimulable phosphor.
A) image buffer
B) scintillator
C) phosphor
D) activator

Accepted Answer

Europium is the activator of the photostimulable phosphor.

Question 13

The computed radiography image has _____.
A) narrow exposure latitude
B) wide exposure latitude
C) improved contrast resolution
D) both B and C

Accepted Answer

The computed radiography image has wide exposure latitude and improved contrast resolution.

Question 14

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

Accepted Answer

The computed radiography reader is made up of mechanical,optical,and computer modules.

Question 15

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

Accepted Answer

The digital imaging plate should be used soon after the erase cycle to prevent fog from background radiation.

Question 16

The principal source of noise in computed radiography is _____.
A) scatter radiation
B) background radiation
C) computer noise
D) phosphor scatter

Accepted Answer

The principal source of noise in computed radiography is scatter radiation.

Question 17

The laser is one of the _____ features of the computed radiography reader.
A) computer
B) chemical
C) mechanical
D) optical

Accepted Answer

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

Question 18

Optical filters are used to filter out the _____ light and allow the _____ light to reach the photodetector.
A) stimulating, emitted
B) emitted, stimulated
C) emitted, monochromatic
D) stimulating, monochromatic

Accepted Answer

Optical filters are used to filter out the stimulating light and allow the emitted light to reach the photodetector.

Question 19

The output signal from the photostimulable phosphor plate is converted from analog to digital by the _____.
A) optical system
B) computer controls
C) photodetector
D) drive mechanism

Accepted Answer

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

Question 20

Computed radiography and screen-film imaging both have a(n)_____.
A) image receptor response function
B) characteristic curve
C) digital image
D) latent image

Accepted Answer

One of the similarities between computed radiography and screen-film imaging is that both have a latent image.

Quiz 15: Computed Radiography

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

Computed radiography cassettes and film/screen cassettes can be used interchangeably with any x-ray imaging system.

Computed radiography screens respond to radiation with _____.

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

The four steps of creating an image with computed radiography are _____.

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

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

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

With computed radiography the contrast is _____.

Digital radiography was first introduced by _____.

The photostimulable phosphor screen is handled in a _____.

Europium is the _____ of the photostimulable phosphor.

The computed radiography image has _____.

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

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

The principal source of noise in computed radiography is _____.

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

Optical filters are used to filter out the _ light and allow the _ light to reach the photodetector.

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

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

Quiz 15: Computed Radiography

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

Computed radiography cassettes and film/screen cassettes can be used interchangeably with any x-ray imaging system.

Computed radiography screens respond to radiation with _____.

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

The four steps of creating an image with computed radiography are _____.

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

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

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

With computed radiography the contrast is _____.

Digital radiography was first introduced by _____.

The photostimulable phosphor screen is handled in a _____.

Europium is the _____ of the photostimulable phosphor.

The computed radiography image has _____.

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

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

The principal source of noise in computed radiography is _____.

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

Optical filters are used to filter out the _____ light and allow the _____ light to reach the photodetector.

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

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

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

Optical filters are used to filter out the _ light and allow the _ light to reach the photodetector.