Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Radiography > Image Receptors- Film > Flashcards

Image Receptors- Film Flashcards

1
Q

What is the outer plastic layer for?

A

Keeps film dry
Protects film from light
Indicates correct orientation of film ( white side towards x Ray tube)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the black paper for?

A

Protects from light

Stiffens and supports film

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is lead foil for?

A

Absorbs x Ray’s

Prevents scatter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the film made up of?

A 
Plastic base
Anti glare tint- blue
Adhesive layer
Double emulsion
Protective gelatin layer
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the emulsion made up of?

A

Silver halide crystals suspended in gelatin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the purpose of the gelatin?

A

Allows even distribution of crystals

Absorbs liquid readily to allow processing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does the adhesive layer do?

A

Sticks the emulsion to the base

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How is an image formed?

A

Direct action
Xrays photons hits silver halide crystals in emulsion
Crystals become sensitised
Latent image produced

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is a latent image?

A

Pattern produced within emulsion

Not visa lie to naked eye

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is film speed?

A

Sensitivity of film to xrays
Exposure required to produce a given amount of blackening
Dependant on the size of crystal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How does the size of crystals affect film speed?

A

Larger crystals = faster film speed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How does the film speed affect the amount of xrays required to produce image?

A

Faster film speed requires less xrays to produce image

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Where is indirect film used?

A

Extra oral radiographs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are indirect action films sensitive to?

A

Primarily light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Where is the light produced re. Indirect film?

A

Intensifying screen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What effect does the intensifying screen have on dose?

A

Reduces exposure required to produce image therefore reduces dose

17
Q

What is the intensifying screen made up of?

A

Base- polyester
Reflective layer
Phosphor layer
Super coat

18
Q

What does phosphor layer do?

A

Emits light when excited by xrays

19
Q

What demos the super coat do?

A

Protects phosphor layer from damage

20
Q

How is image formed re. Indirect film?

A

X-ray photon hits phosphor crystals in intensifying screen
Light given off
Light hits silver halide crystals within film emulsion
Latent image produced

21
Q

What is a film packet made up from?

A 
Barrier wrap
Outer plastic 
Black paper
Lead foil
Film
Emulsion

Radiography (18 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions