Question 1

Computed radiography imaging produces _____________ gray levels.
A) 30
B) 100
C) 10,000
D) 1,000,000

Accepted Answer

Computed radiography imaging produces 10,000 gray levels.

Question 2

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 3

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 4

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 5

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 6

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 7

The laser beam must be less than 100 µm in diameter in order to maintain ________.
A) consistent beam shape
B) smooth image edges
C) high spatial resolution
D) high speed

Accepted Answer

As the laser beam intensity increases, so does the intensity of the emitted signal. Small laser beam diameter is critical for ensuring high spatial resolution.

Question 8

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 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

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 and III
D) I, II, and III

Accepted Answer

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

Question 11

_____________ is prevented by flooding the erased imaging plate with bright light.
A) Image fog
B) Noise
C) Overexposure
D) Ghosting

Accepted Answer

Ghosting is prevented by flooding the erased imaging plate with bright light.

Question 12

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 13

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 14

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 15

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 16

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 17

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 18

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 19

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.

Quiz 15: Computed Radiography

Computed radiography imaging produces _____________ gray levels.

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

The computed radiography image has _____________________.

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

Europium is the ______________ of the photostimulable phosphor.

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

The laser beam must be less than 100 µm in diameter in order to maintain ________.

The principal source of noise in computed radiography is ____________________.

With computed radiography the contrast is _______________________________.

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

_____________ is prevented by flooding the erased imaging plate with bright light.

The photostimulable phosphor screen is handled in a ______________.

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

Digital radiography was first introduced by ______________.

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

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

Computed radiography screens respond to radiation with ______________________.

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

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

Quiz 15: Computed Radiography

Computed radiography imaging produces _____________ gray levels.

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

The computed radiography image has _____________________.

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

Europium is the ______________ of the photostimulable phosphor.

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

The laser beam must be less than 100 µm in diameter in order to maintain ________.

The principal source of noise in computed radiography is ____________________.

With computed radiography the contrast is _______________________________.

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

_____________ is prevented by flooding the erased imaging plate with bright light.

The photostimulable phosphor screen is handled in a ______________.

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

Digital radiography was first introduced by ______________.

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

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

Computed radiography screens respond to radiation with ______________________.

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

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

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.