Question 1

To eliminate quantum mottle,

Accepted Answer

A) increase kVp. 
B) decrease mAs. 
C) increase mAs. 
D) increase KVp. 
A) increase kVp. 
B) decrease mAs. 
C) increase mAs. 
D) increase KVp. C

Question 2

Cassettes stored for extended periods of time should be stored

Accepted Answer

A) flat. 
B) empty. 
C) at temperatures approaching 100$\circ$ F. 
D) in a darkened room. 
A) flat. 
B) empty. 
C) at temperatures approaching 100$\circ$ F. 
D) in a darkened room. B

Question 3

The precise wavelength of light emitted by the phosphor is termed the

Accepted Answer

A) spectral emission. 
B) conversion efficiency. 
C) conversion emission. 
D) spectral efficiency. 
A) spectral emission. 
B) conversion efficiency. 
C) conversion emission. 
D) spectral efficiency. A

Question 4

The predominant type of interaction that takes place between the x-ray photon and the high-atomic-number phosphor of the intensifying screen is

Accepted Answer

A) photoelectric. 
B) Compton. 
C) pair production. 
D) Bremsstrahlung. 
A) photoelectric. 
B) Compton. 
C) pair production. 
D) Bremsstrahlung.

Question 5

An important component of the base of an intensifying screen is

Accepted Answer

A) intensification speed. 
B) uniform radiolucency. 
C) even radiopacity. 
D) none of the above 
A) intensification speed. 
B) uniform radiolucency. 
C) even radiopacity. 
D) none of the above

Question 6

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

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 7

Match the following choices with the correct statement as they relate to film-screen image receptor systems.
-green-emitting rare earth phosphor

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 8

When a phosphor is struck by an x-ray photon, it will emit light

Accepted Answer

A) parallel to the angle of incidence. 
B) perpendicular to the angle of incidence. 
C) at a 45-degree angle to the angle of incidence. 
D) in all directions. 
A) parallel to the angle of incidence. 
B) perpendicular to the angle of incidence. 
C) at a 45-degree angle to the angle of incidence. 
D) in all directions.

Question 9

To increase the speed of an intensifying screen,

Accepted Answer

A) increase phosphor size. 
B) decrease the phosphor layer thickness. 
C) decrease phosphor concentration. 
D) remove the reflective layer. 
A) increase phosphor size. 
B) decrease the phosphor layer thickness. 
C) decrease phosphor concentration. 
D) remove the reflective layer.

Question 10

Match the following choices with the correct statement as they relate to film-screen image receptor systems.
-quantification of receptor system fidelity

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

Delayed phosphorescent emission is called

Accepted Answer

A) screen lag. 
B) afterglow. 
C) phosphor drag. 
D) both a and b 
A) screen lag. 
B) afterglow. 
C) phosphor drag. 
D) both a and b

Question 12

Film screen system with high RS values tend to offer

Accepted Answer

A) high resolution. 
B) lower patient dose. 
C) greater exposure latitude. 
D) all of the above 
A) high resolution. 
B) lower patient dose. 
C) greater exposure latitude. 
D) all of the above

Question 13

Match the following choices with the correct statement as they relate to film-screen image receptor systems.
-RS of 1600

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 14

An intensifying screen consists of all of the following components EXCEPT

Accepted Answer

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

Question 15

What percentage of the latent image is formed by x-ray photons?

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 16

Poor screen/film contact can produce

Accepted Answer

A) increased radiographic film density. 
B) loss of resolution. 
C) loss of contrast. 
D) decreased screen efficiency. 
A) increased radiographic film density. 
B) loss of resolution. 
C) loss of contrast. 
D) decreased screen efficiency.

Question 17

A film screen system that possesses high latitude will

Accepted Answer

A) produce high contrast images. 
B) require precise exposure techniques. 
C) produce images with many gray shades. 
D) all of the above 
A) produce high contrast images. 
B) require precise exposure techniques. 
C) produce images with many gray shades. 
D) all of the above

Question 18

Which film type is more sensitive to the entire range of rare-earth phosphor emissions?

Accepted Answer

A) blue sensitive 
B) yellow sensitive 
C) green sensitive 
D) violet sensitive 
A) blue sensitive 
B) yellow sensitive 
C) green sensitive 
D) violet sensitive

Question 19

Of the choices below, which one will yield a radiographic image with the highest spatial resolution?

Accepted Answer

A) an image system with a MTF of 0.7 
B) an image system with a MTF of 0.4 
C) an image system with an average gradient of 2.0 
D) an image system with an image density of 1.2 
A) an image system with a MTF of 0.7 
B) an image system with a MTF of 0.4 
C) an image system with an average gradient of 2.0 
D) an image system with an image density of 1.2

Question 20

If an imaging system with an RS value of 200 requires an exposure of 12 mAs, switching to a system with RS 800 speed will

Accepted Answer

A) require 3 mAs. 
B) require 48 mAs. 
C) require a 15% increase in kVp. 
D) improve image resolution. 
A) require 3 mAs. 
B) require 48 mAs. 
C) require a 15% increase in kVp. 
D) improve image resolution.

Exam 22: Intensifying Screens and Film Screen Combinations

To eliminate quantum mottle,

Cassettes stored for extended periods of time should be stored

The precise wavelength of light emitted by the phosphor is termed the

The predominant type of interaction that takes place between the x-ray photon and the high-atomic-number phosphor of the intensifying screen is

An important component of the base of an intensifying screen is

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

Match the following choices with the correct statement as they relate to film-screen image receptor systems. -green-emitting rare earth phosphor

When a phosphor is struck by an x-ray photon, it will emit light

To increase the speed of an intensifying screen,

Match the following choices with the correct statement as they relate to film-screen image receptor systems. -quantification of receptor system fidelity

Delayed phosphorescent emission is called

Film screen system with high RS values tend to offer

Match the following choices with the correct statement as they relate to film-screen image receptor systems. -RS of 1600

An intensifying screen consists of all of the following components EXCEPT

What percentage of the latent image is formed by x-ray photons?

Poor screen/film contact can produce

A film screen system that possesses high latitude will

Which film type is more sensitive to the entire range of rare-earth phosphor emissions?

Of the choices below, which one will yield a radiographic image with the highest spatial resolution?

If an imaging system with an RS value of 200 requires an exposure of 12 mAs, switching to a system with RS 800 speed will

Basic Mathematics

Radiation Concepts

Electricity

Electromagnetism

X-Ray Equipment

The X-Ray Tube

X-Ray Production

Radiation Protection Concepts and Equipment

Radiation Protection Procedures for Patients and Personnel

Filtration

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X-Ray Interactions

Minimizing Patient Dose

Vision and Perception

Beam Restriction

The Patient As a Beam Emitter

The Pathology Problem

The Grid

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Film Sensitometry

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Picture Archiving and Communication Systems Pacs

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Densityir Exposure

Contrast

Recorded Detail

Distortion

The Art of Image Critique

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Exposure Systems and Charts

Automatic Exposure Controls

Exposure Conversion Problems

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