Deck 12: Screen-Film Radiography

Question 1

Photon interactions in the emulsion occur with exposure to __________________.

A) x-rays
B) light
C) heat
D) Both A and B

Answer 1

Both A and B

Question 2

A contaminant in the silver halide crystal creates the ____________________.

A) sensitivity centers
B) latent image
C) manifest image
D) image fog

Answer 2

sensitivity centers

Question 3

The layer of screen that lies closest to the film is the ____________________.

A) screen base
B) fluorescent layer
C) protective coating
D) reflective layer

Answer 3

protective coating

Question 4

Photon interactions free the electrons from ________ atoms in the silver halide crystal.

A) bromide
B) iodide
C) silver
D) Both A and B

Question 5

The latent image is made up of ___________ atoms.

A) bromide
B) silver
C) iodine
D) sulfide

Question 6

High contrast film contains __________ silver halide crystals of ____________ size.

A) larger, varying
B) larger, uniform
C) smaller, uniform
D) smaller, varying

Question 7

Crystals in film emulsion consist of __________________ and __________________.

A) potassium bromide, silver bromide
B) silver nitrate, silver bromide
C) silver bromide, silver iodide
D) silver nitrate, potassium bromide

Question 8

Which of the following lists the steps of automatic processing in the correct order?

A) Wetting, fixing, developing, washing, drying
B) Wetting, developing, fixing, washing, drying
C) Developing, fixing, wetting, washing, drying
D) Fixing, wetting, developing, washing, drying

Question 9

Luminescent material emits light after its outer shell electrons are _____________.

A) excited
B) ejected
C) removed
D) Any of the above

Question 10

The main purpose of the gelatin emulsion in radiographic film is to _______________.

A) resist chemical penetration
B) hold the silver halide crystals
C) maintain dimensional stability
D) protect the base

Question 11

All of the following are advantages of proper screen-film use except

A) flexibility of kVp selection.
B) adjustment of radiographic contrast.
C) decreased patient dose.
D) spatial resolution is increased.

Question 12

A phosphorescent material emits light ______________________________.

A) for a period of time after stimulation
B) only while it is stimulated
C) for less than a nanosecond
D) only from chemical stimulation

Question 13

Film is made with double emulsion to enhance film __________.

A) sensitivity
B) latitude
C) contrast
D) speed

Question 14

The two basic components of radiographic film are the _______ and the ___________.

A) base, adhesive layer
B) base, emulsion
C) emulsion, gelatin
D) emulsion, silver halide

Question 15

An intensifying screen is an example of __________________.

A) luminescence
B) fluorescence
C) phosphorescence
D) Both A and B

Question 16

The latent image can be seen _______________________.

A) with a microscope
B) with the naked eye
C) only after development
D) only under red light

Question 17

Screen characteristics are determined by the __________________.

A) size of the phosphor crystals
B) thickness of the phosphor layer
C) phosphor composition
D) All of the above

Question 18

The intensification factor is a measurement of screen _____________.

A) resolution
B) speed
C) noise
D) quality

Question 19

Latent image formation occurs during film _______________.

A) processing
B) manufacturing
C) storage
D) exposure

Question 20

The overcoat on radiographic film is a protective covering of _____________.

A) gelatin
B) polyester
C) adhesive
D) cellulose

Question 21

Image noise in increased with increased _______________________.

A) detective quantum efficiency (DQE)
B) conversion efficiency (CE)
C) Both A and B
D) None of the above

Question 22

Both the isotropic emission of light from screen phosphor crystals and the added reflective layer contribute to ________________.

A) conversion efficiency
B) image blur
C) quantum mottle
D) detective quantum efficiency

Question 23

The intensification factor is the exposure required ________________ divided by the exposure required _______________.

A) with one screen, with two screens
B) with two screens, with one screen
C) without screens, with screens
D) with screens, without screens

Question 24

The ability of an intensifying screen to absorb x-rays is called __________________.

A) quantum mottle
B) intensification factor
C) conversion efficiency
D) detective quantum efficiency

Question 25

The intensification factor increases with increased _____.

A) kVp
B) mAs
C) dye
D) temperature