Film

Question 1

Provides rigid structure on film imaging

Answer 1

Base

Question 2

“active” layer on film; made with gelatin and silver halide crystals

Answer 2

Emulsion

Question 3

Lowers patient dose, controls screen speed and uses luminescence/fluorescence

Answer 3

Intensifying screen

Question 4

Intensifying screens have ___ layers

Answer 4

4; protective coating, phosphor, reflective layer, base

Question 5

The emission of light when stimulated by radiation

Answer 5

Luminescence

Question 6

The ability of phosphors to only emit light when exposed to x-rays

Answer 6

Fluorescence

Question 7

At what stage does the process of removing unexposed and undeveloped silver halide from the film emulsion occur?

Answer 7

Fixing

Question 8

The front or tube side of radiographic cassettes should be made of a material that:

Answer 8

Absorbs very little of the x-ray beam

Question 9

The greater the film speed, the ______ sensitive it is.

Answer 9

more

Question 10

The greater the film speed, the number of silver halide crystals ______

Answer 10

increases

Question 11

The intensifying screens convert the exit radiation intensities into:

Answer 11

visible light

Question 12

The radiation- and light-sensitive material used in the emulsion of radiographic film is called?

Answer 12

Silver halide crystals

Question 13

What is the correct sequence of film processing?

Answer 13

developing, fixing, washing, drying

Question 14

What is the outermost, durable protection layer of radiographic film called?

Answer 14

Supercoat

Question 15

What is the purpose of the intensifying screen?

Answer 15

To reduce the amount of exposure to the patient

Question 16

What is the term specifically used to emit visible light during x-ray exposure with little or no afterglow?

Answer 16

Fluorescence

Question 17

When a film has emulsion coated on both sides of the base versus one side of the base, the film is referred to as:

Answer 17

Double-emulsion film

Question 18

Which layer of the intensifying screen is closest to the film and protects the phosphor?

Answer 18

Protective layer

Question 19

Which layer of the radiographic film contains crystals suspended in gelatin that serve as the latent imaging centers?

Answer 19

Emulsion

Question 20

Which of the following is a major limitation in film-screen imaging?

Answer 20

Limited dynamic range

Question 21

According to the Gurney-Mott theory, exposure of the silver bromide crystals in the film emulsion by light or x-ray photons creates the latent image and initiates the conversion process. What completes the conversion process and transforms the image into a permanent visible image?

Answer 21

Chemical processing

Question 22

In film, the most important layer is the:

Answer 22

Emulsion layer

Question 23

Latent image formation occurs during film ____

Answer 23

Exposure

Question 24

What is the first step in film processing?

Answer 24

Developer

Question 25

What is the latent image center for radiographic film?

Answer 25

Sensitivity speck

Question 26

What describes a film's sensitivity to light?

Answer 26

Speed

Question 27

What chemical agent is responsible for clearing the unexposed silver halide crystals during film processing?

Answer 27

Ammonium thiosulfate

Question 28

Why is silver recovery necessary during film processing? A. It is a natural resource. B. It is toxic to the environment. C. It has monetary value. D. All of the above

Answer 28

D

Question 29

What reducing agent acts slowly to produce the higher densities on a film radiograph?

Answer 29

Hydroquinone

Question 30

Which automatic processing system primarily maintains the chemical activity level?

Answer 30

Replenishment

Question 31

What term is defined as a measure of the amount of light transmitted through the film?

Answer 31

OD

Question 32

What is the diagnostic range of optical densities?

Answer 32

0.5 to 2.0

Question 33

Changes in radiation exposure have the greatest effect on optical densities in which sensitometric region?

Answer 33

straight-line

Question 34

When the exposure technique used produces densities outside the straight-line portion of a sensitometric curve, how was contrast affected?

Answer 34

Decreased

Question 35

What do dry imagers use to process the latent image on the film?

Answer 35

Heat