Radiography Ch7 Dental X-Ray Film

Front 1

Adhesive layer

Back 1

A thin layer of adhesive material that covers both sides of the receptor base and attaches the emulsion to the base.

Front 2

Cassette

Back 2

A light-tight device used in extraoral radiography to hold the film and intensifying screens.

Front 3

Film, blue-sensitive

Back 3

An extraoral film that requires the use of a screen for exposure and is sensitive to blue fluorescent light; this film must be paired with screens that produce blue light.

Front 4

film, cephalometric

Back 4

Lateral cephalometric projection
An extraoral image that is used to determine facial growth and development, trauma, disease, and developmental abnormalities.

Front 5

Film, D-speed

Back 5

The slowest intraoral film; used before E-speed film; the letter D identifies the film speed.

Front 6

Film, duplicating

Back 6

A special type of photographic film used to make an identical copy (duplicate) of an intraoral or extraoral radiograph; this film is not exposed to x-radiation.

Front 7

Film, F-speed

Back 7

The fastest intraoral film available; the letter F identifies the film speed; also called InSight.

Front 8

Film, green-sensitive

Back 8

An extraoral film that requires the use of a screen for exposure and is sensitive to green fluorescent light; this film must be paired with screens that produce green light.

Front 9

Film, nonscreen

Back 9

An extraoral film that does not require the use of a screen for exposure.

Front 10

Film, screen

Back 10

An extraoral film that requires the use of a screen for exposure; this film is sensitive to the light emitted from intensifying screens.

Front 11

Film, x-ray

Back 11

An image receptor that consists of a film base, adhesive layer, film emulsion, and protective layer; three types of x-ray film may be used in dental radiography: (1) intraoral film, (2) extraoral film, and (3) duplicating film.

Front 12

Film base

Back 12

A flexible piece of plastic that is constructed to withstand heat, moisture, and chemical exposure and provides strength and stable support for the film emulsion.

Front 13

Film emulsion

Back 13

A coating attached to both sides of the film base by the adhesive layer to give the film greater sensitivity to x-radiation; homogenous mixture of gelatin and silver halide crystals.

Front 14

Film speed

Back 14

The amount of radiation required to produce a radiograph of standard density.

Front 15

Fluorescence

Back 15

The emission of a glowing light by certain substances when struck by a particular wavelength (e.g., calcium tungstate screens have phosphors that emit blue light, or fluoresce, when exposed to x-rays).

Front 16

Gelatin

Back 16

A component of the film emulsion that suspends and disperses silver halide crystals over the film base.

Front 17

Halide

Back 17

A chemical compound that is sensitive to radiation or light; in dental radiography, a halide, such as silver bromide, is suspended in the gelatin of the emulsion.

Front 18

Identification dot

Back 18

A small raised bump that appears in one corner of an intraoral film; used to determine film orientation.

Front 19

Image

Back 19

A picture or likeness of an object.

Front 20

Image receptor

Back 20

A recording medium; examples include x-ray film or digital sensors

Front 21

Interproximal

Back 21

Between two adjacent surfaces.

Front 22

Label side

Back 22

The outer side of the x-ray film packet that is color-coded and contains printed information; the label side of the film faces the tongue.

Front 23

Latent image

Back 23

The pattern of stored energy on the exposed film; the invisible image produced when the film is exposed to x-rays and that remains invisible until the film is processed.

Front 24

Latent image centers

Back 24

Aggregates of neutral silver atoms on exposed crystals that collectively become the latent image on the emulsion of the film.

Front 25

Lead foil sheet

Back 25

One of the four components of the dental x-ray film packet; a single piece of embossed lead foil placed behind the film to shield the film from scattered radiation.

Front 26

Outer package wrapping

Back 26

One of the four components of the dental x-ray film packet; a soft vinyl or paper wrapper that serves to protect the film from exposure to light and saliva. It has two sides: the tube side and the label side.

Front 27

Packet, film

Back 27

The intraoral film and its surrounding packaging.

Front 28

Packet, one-film

Back 28

A film packet containing one film.

Front 29

Packet, two-film

Back 29

A film packet containing two films.

Front 30

Paper film wrapper

Back 30

One of the four components of the dental x-ray film packet; a black paper protective sheet covers the film and shields it from light.

Front 31

Phosphors

Back 31

Minute fluorescent crystals that cover intensifying screens and fluoresce, or emit visible light, when exposed to x-rays.

Front 32

Protective layer

Back 32

One of the four basic components of x-ray film; a thin, protective coating on top of the emulsion that protects the film from manipulation and mechanical and processing damage.

Front 33

Radiograph, duplicate

Back 33

An identical copy of a radiograph that is made through the process of film duplication.

Front 34

Receptor

Back 34

Something that responds to a stimulus; a recording medium (examples: x-ray film or digital sensors).

Front 35

Screen, calcium tungstate

Back 35

A type of intensifying screen used in extraoral radiography; contains phosphors that emit blue light.

Front 36

Screen, intensifying

Back 36

A device used in extraoral radiography that converts x-ray energy into visible light; the light, in turn, exposes the screen film.

Front 37

Screen, rare earth

Back 37

A type of intensifying screen used in extraoral radiography; contains phosphors not usually found in the earth that emit green light.

Front 38

Sensitivity speck

Back 38

An irregularity within the lattice structure of the exposed silver halide crystals that attracts the silver atoms.

Front 39

Silver halide crystals

Back 39

Crystals that are suspended in the emulsion of the dental x-ray film (e.g., silver bromide, silver iodide); function to absorb radiation during x-ray exposure and store energy from the radiation.

Front 40

Tube side

Back 40

The outer side of the x-ray film packet that is solid white and exhibits a raised bump in one corner; the tube side of the film faces the teeth and tubehead.