Image Production and Evaluation

Question 1

these are x-rays that exit the patient and interact with the image receptor

Answer 1

image forming x-rays (remnant beam)

Question 2

the most common image receptor

Answer 2

photographic film

Question 3

medium that converts x-ray bean into a visible image

Answer 3

image receptor

Question 4

parts of a radiographic film

Answer 4

base
adhesive layer
emulsion
overcoat

Question 5

x-ray films that have the emulsion coated on both sides

Answer 5

double emulsion film

Question 6

thin coating material between the emulsion and the base that maintain proper contact and integrity during use and processing

Answer 6

adhesive layer

Question 7

protective covering enclosing the emulsion

Answer 7

overcoat

Question 8

material that makes up the overcoat

Answer 8

gelatin

Question 9

thickness of a radiographic film is approx. [..]

Answer 9

150-300 um

Question 10

foundation of the film, rigid, flexible and fracture resistant

Answer 10

base

Question 11

thickness of the base of radiographic film [..]

Answer 11

150-300 um

Question 12

characteristics of a radiographic film base

Answer 12

semi-rigid
lucent
made up of polyester

Question 13

the base of a radiographic film is made up of [..]

Answer 13

polyester

Question 14

property of a radiographic film base that [maintains its size and shape to avoid image distortion

Answer 14

dimensional stability

Question 15

property of a radiographic film base that [makes it nearly transparent to light so ther is no unwanted pattern/shading]

Answer 15

uniform lucency

Question 16

this is added to the base of radiographic fillms to reduce eyestrain and fatigue

Answer 16

dye (slight blue tint)

Question 17

original term for radiographs

Answer 17

x-ray plates

Question 18

original radiographic film base

Answer 18

glass plates

Question 19

substitute material that became a standard base in early 1920s

Answer 19

cellulose nitrate

Question 20

disadvantage of cellulose nitrate

Answer 20

flammable
improper storage and handling lead to hospital fires

Question 21

introduced in early 1920s “safety base”

Answer 21

cellulose triacetate

Question 22

radiographic film base introduced in early 1960s “best of choice”

Answer 22

polyester base

Question 23

characteristics of a polyester base

Answer 23

1. more resistant to warping
2. superior dimensional stability
3. thinner than triacetate bases but strong

Question 24

polyester base size

Answer 24

175 um

Question 25

the heart of the x-ray film

Answer 25

emulsion

Question 26

the material where x-rays and light photons from screens interact

Answer 26

emulsion

Question 27

the emulsion consists of a homogenous mixture of [..]

Answer 27

gelatin and silver halide crystals

Question 28

size of an emulsion

Answer 28

3-5 um thick

Question 29

properties of an emulsion that affect film speed

Answer 29

size and concentration of crystals

Question 30

invisible image formed after an exposure is called [..]

Answer 30

latent image

Question 31

latent image turns to [..] after proper processing

Answer 31

manifest image

Question 32

a theory that is accepted as an explanation of latent image formation

Answer 32

Gurney-Mott Theory

Question 33

composition of a crystal latice ion

Answer 33

silver atoms
bromine atoms
iodine atoms

Question 34

an atom that is either made up of too many or too few electrons

Answer 34

ion

Question 35

an inherent defect in the structure of silver halide crystals

Answer 35

Frankel Defect

Question 36

type of film used with intensifying screens

Answer 36

screen-film