Question 1

What percentage of the latent image is formed by the light photons produced from the intensifying screen?

Accepted Answer

A) 100 percent 
B) 99 percent 
C) 50 percent 
D) 1 percent 
A) 100 percent 
B) 99 percent 
C) 50 percent 
D) 1 percent

Question 2

When light is emitted from a phosphor instantaneously upon photon excitation, it is called

Accepted Answer

A) intensification. 
B) fluorescence. 
C) phosphorescence. 
D) luminescence. 
A) intensification. 
B) fluorescence. 
C) phosphorescence. 
D) luminescence.

Question 3

When selecting a film/screen combination, a principal consideration in the best choice is

Accepted Answer

A) image contrast and exposure latitude. 
B) image contrast and resolution. 
C) MTF and dose. 
D) line pair resolution and MTF. 
A) image contrast and exposure latitude. 
B) image contrast and resolution. 
C) MTF and dose. 
D) line pair resolution and MTF.

Question 4

When an insufficient quantity of photons strikes the intensifying screen, ____ will appear on the film as graininess.

Accepted Answer

A) lagging speed 
B) quantum mottle 
C) shadowing 
D) latitude 
A) lagging speed 
B) quantum mottle 
C) shadowing 
D) latitude

Question 5

Recorded detail is measured by all of the following EXCEPT

Accepted Answer

A) line spread function. 
B) modulation transfer function. 
C) line pairs per millimeter. 
D) contrast sensitivity. 
A) line spread function. 
B) modulation transfer function. 
C) line pairs per millimeter. 
D) contrast sensitivity.

Question 6

The ability of a material to emit light in response to excitation is

Accepted Answer

A) intensification. 
B) fluorescence. 
C) phosphorescence. 
D) luminescence. 
A) intensification. 
B) fluorescence. 
C) phosphorescence. 
D) luminescence.

Question 7

Light emitted from a phosphor that continues after photon excitation ends is called

Accepted Answer

A) intensification. 
B) fluorescence. 
C) phosphorescence. 
D) luminescence. 
A) intensification. 
B) fluorescence. 
C) phosphorescence. 
D) luminescence.

Question 8

Match the following choices with the correct statement as they relate to film-screen image receptor systems.
-emission of light energy upon stimulation

Accepted Answer

A) CaWO4 
B) gadolinium oxysulfide:terbium activated 
C) fluorescence 
D) conversion efficiency 
E) RS 100
F)MTF
G)artifact
H)phosphorescence
I)increases quantum mottle
J)line spread function
K)RS 400
L)lp/mm 
A) CaWO4 
B) gadolinium oxysulfide:terbium activated 
C) fluorescence 
D) conversion efficiency 
E) RS 100
F)MTF
G)artifact
H)phosphorescence
I)increases quantum mottle
J)line spread function
K)RS 400
L)lp/mm

Question 9

Intensifying screens are used to

Accepted Answer

A) reduce patient radiation dose. 
B) produce light photons. 
C) amplify the incoming x-ray beam. 
D) all of the above 
A) reduce patient radiation dose. 
B) produce light photons. 
C) amplify the incoming x-ray beam. 
D) all of the above

Question 10

Match the following choices with the correct statement as they relate to film-screen image receptor systems.
-reference value for system speeds

Accepted Answer

A) CaWO4 
B) gadolinium oxysulfide:terbium activated 
C) fluorescence 
D) conversion efficiency 
E) RS 100
F)MTF
G)artifact
H)phosphorescence
I)increases quantum mottle
J)line spread function
K)RS 400
L)lp/mm 
A) CaWO4 
B) gadolinium oxysulfide:terbium activated 
C) fluorescence 
D) conversion efficiency 
E) RS 100
F)MTF
G)artifact
H)phosphorescence
I)increases quantum mottle
J)line spread function
K)RS 400
L)lp/mm

Question 11

The ability of the phosphor to emit as much light per x-ray photon interaction as possible is a measurement of the

Accepted Answer

A) brilliance. 
B) spectral emission. 
C) atomic number. 
D) screen speed. 
A) brilliance. 
B) spectral emission. 
C) atomic number. 
D) screen speed.

Question 12

Intensifying-screen resolution is controlled all of the of the following phosphor characteristics EXCEPT

Accepted Answer

A) crystal size. 
B) layer thickness. 
C) concentration. 
D) adhesion. 
A) crystal size. 
B) layer thickness. 
C) concentration. 
D) adhesion.

Question 13

The protective layer of an intensifying screen is easily damaged by

Accepted Answer

A) excess light. 
B) fingernails. 
C) single-emulsion film. 
D) screen cleaners. 
A) excess light. 
B) fingernails. 
C) single-emulsion film. 
D) screen cleaners.

Question 14

The active layer of the intensifying screen is the

Accepted Answer

A) base. 
B) reflective layer. 
C) protective layer. 
D) phosphor layer. 
A) base. 
B) reflective layer. 
C) protective layer. 
D) phosphor layer.

Question 15

Using an imaging system of RS 300, the system sensitivity would be

Accepted Answer

A) 0.43 mR. 
B) 2.34 mR. 
C) 96 mR. 
D) 300 mR. 
A) 0.43 mR. 
B) 2.34 mR. 
C) 96 mR. 
D) 300 mR.

Question 16

The rare-earth screens use phosphors with atomic numbers of

Accepted Answer

A) 3 to 11. 
B) 12 to 27. 
C) 57 to 71. 
D) 98 to 131. 
A) 3 to 11. 
B) 12 to 27. 
C) 57 to 71. 
D) 98 to 131.

Question 17

Which one of the following is not related to resolution?

Accepted Answer

A) screen speed 
B) crystal size 
C) layer thickness 
D) base material 
A) screen speed 
B) crystal size 
C) layer thickness 
D) base material

Question 18

Until the 1970s, the most commonly utilized phosphor in radiography was

Accepted Answer

A) calcium tungstate. 
B) rare earths. 
C) gadolinium. 
D) lanthanum. 
A) calcium tungstate. 
B) rare earths. 
C) gadolinium. 
D) lanthanum.

Question 19

Match the following choices with the correct statement as they relate to film-screen image receptor systems.
-non-clinical, extraneous information on the final image

Accepted Answer

A) CaWO4 
B) gadolinium oxysulfide:terbium activated 
C) fluorescence 
D) conversion efficiency 
E) RS 100
F)MTF
G)artifact
H)phosphorescence
I)increases quantum mottle
J)line spread function
K)RS 400
L)lp/mm 
A) CaWO4 
B) gadolinium oxysulfide:terbium activated 
C) fluorescence 
D) conversion efficiency 
E) RS 100
F)MTF
G)artifact
H)phosphorescence
I)increases quantum mottle
J)line spread function
K)RS 400
L)lp/mm

Question 20

Match the following choices with the correct statement as they relate to film-screen image receptor systems.
-screen lag

Accepted Answer

A) CaWO4 
B) gadolinium oxysulfide:terbium activated 
C) fluorescence 
D) conversion efficiency 
E) RS 100
F)MTF
G)artifact
H)phosphorescence
I)increases quantum mottle
J)line spread function
K)RS 400
L)lp/mm 
A) CaWO4 
B) gadolinium oxysulfide:terbium activated 
C) fluorescence 
D) conversion efficiency 
E) RS 100
F)MTF
G)artifact
H)phosphorescence
I)increases quantum mottle
J)line spread function
K)RS 400
L)lp/mm

Exam 22: Intensifying Screens and Film Screen Combinations

What percentage of the latent image is formed by the light photons produced from the intensifying screen?

When light is emitted from a phosphor instantaneously upon photon excitation, it is called

When selecting a film/screen combination, a principal consideration in the best choice is

When an insufficient quantity of photons strikes the intensifying screen, ____ will appear on the film as graininess.

Recorded detail is measured by all of the following EXCEPT

The ability of a material to emit light in response to excitation is

Light emitted from a phosphor that continues after photon excitation ends is called

Match the following choices with the correct statement as they relate to film-screen image receptor systems. -emission of light energy upon stimulation

Intensifying screens are used to

Match the following choices with the correct statement as they relate to film-screen image receptor systems. -reference value for system speeds

The ability of the phosphor to emit as much light per x-ray photon interaction as possible is a measurement of the

Intensifying-screen resolution is controlled all of the of the following phosphor characteristics EXCEPT

The protective layer of an intensifying screen is easily damaged by

The active layer of the intensifying screen is the

Using an imaging system of RS 300, the system sensitivity would be

The rare-earth screens use phosphors with atomic numbers of

Which one of the following is not related to resolution?

Until the 1970s, the most commonly utilized phosphor in radiography was

Match the following choices with the correct statement as they relate to film-screen image receptor systems. -non-clinical, extraneous information on the final image

Match the following choices with the correct statement as they relate to film-screen image receptor systems. -screen lag

Basic Mathematics

Radiation Concepts

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Recorded Detail

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