XRAY 200 Week 10

old x ray film packet

intraoral film

x ray film composition

types of conventional film

latent image

film expose to image and has not yet been developed

latent image cannot be seen until chemical processing occurs to produce a visible image

film speed (sens) is determined by

size of silver halide crystals, thickness of emulsion, presence of radiosensitive dyes

only DEF used

extraoral film

screen: film placed between 2 intensifying screens for exposure

non-screen: film exposed directly to x rays, requires longer exposure time,

duplicating film

used to make an exact copy of an image

only used in a dark room setting, never exposed to radiation

traditional film storage

must be kept in a cool dry place, stored shielded from radiation, must be used before expiration date

film processing directly affects the quality of the x ray

the purpose of film processing is

to convert latent image on the film into a visible image

perserve image

manual + auto processing

1. development

2. rinsing

3. fixing

4. washing

5. drying

manual processing

must be completed in a dark room, light ruins the image

minimum of ___ feet from film and work surface

4

how an automatic processor works

fixer: any chem not exposed to rad washes away

water comp: rinse off

automatic processing takes _____ with manual processing

4-6 minutes up to one hour

time and temp errors

underdeveloped

too light

overdeveloped

super dark

reticulation of emulsion

chem contamination of errors

film of handling errors

film handling errors cont.

fixing hanfling errors

lighting errors

air bubbles

fingernail artifact

fingerprint