radiology part 2

Question 1

film base

Answer 1

provides support and strength for delicate emulsion,

Question 2

adhesive layer

Answer 2

covers both sides of the film base , attaches emulsion to the base

Question 3

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

Answer 3

film emulsion

Question 4

2 most important ingredients of photographic emulsion

Answer 4

gelatin, silver halide crystals

Question 5

halide crystals

Answer 5

chemical compound that is light or radiation sensitive

Question 6

two types of silver halide crystals in the film emulsion

Answer 6

silver bromide, silver iodide

Question 7

thin, transparent coating placed over the emulsion. Serves to protect the emulsion surface from manipulation as well as mechanical and processing damage

Answer 7

protective layer

Question 8

t/f; silver halide crystals absorb x-radiation during X-ray. exposure and store the energy from the radiation

Answer 8

true

Question 9

latent

Answer 9

existing but not yet developed

Question 10

silver halide process chain

Answer 10

latent image, develop, stop, fix, visible image

Question 11

intra oral film

Answer 11

placed inside the mouth

Question 12

extra oral film

Answer 12

placed outside the mouth

Question 13

duplicating film

Answer 13

used to make a identical copy of either intra or oral radiograph

Question 14

components of intra-oral film packet

Answer 14

waterproof outer packaging, black paper wrapper, film, lead foil sheet

Question 15

what is the identification dot for?

Answer 15

small raised bump in the corner, used to distinguish left or right sides when mounting.

Question 16

on the film where should the white side face and raised dot face ?

Answer 16

white - directed toward the tube head

dot- points towards incisal/occlusal surface (for PA)

Question 17

t/f; lead foil can be disposed of in general waste

Answer 17

false

Question 18

0

Answer 18

for very little children (PA) (crown and root)and bitewing (BW) film

Question 19

1

Answer 19

used in adult anterior PA with the paralleling technique

Question 20

2

Answer 20

standard film, used for adults posterior PA and BW. Anterior PA with the bisecting technique .

Question 21

3

Answer 21

used for extra long BW in adults. One film covers all teeth on one side of the mouth

Question 22

4

Answer 22

used for occlusal films in adults only

Question 23

periodical film (PA)

Answer 23

Used to examine entire tooth (crown and root) supporting bone

Question 24

what size films can you use for periodical film

Answer 24

size 0,1,2

Question 25

bitewing film

Answer 25

used to examine the crowns of both max and mand.

Useful in examining inter proximal or adjacent tooth surfaces

Question 26

what bitewing helps you look for

Answer 26

caries, examine pulp chamber, overhangs, calculus

Question 27

what sizes used for bitewing

Answer 27

0,1,2,3,

Question 28

occlusal film

Answer 28

used for examination of the max or mand

Question 29

t/f; occlusal film is larger than periodical or bitewing films

Answer 29

true

Question 30

what occlusal film help you look for

Answer 30

retained roots, fractures, changes in size/shape of max and mand, salivary stones

Question 31

what film sizes are used for occlusal film

Answer 31

2- used for occlusal exam on children

4- to show large areas of the upper or lower jaw

Question 32

refers to the amount of radiation required to produce a radiograph of standard density

Answer 32

film speed

Question 33

f-speed

Answer 33

has larger halide crystals than d-speed.

Question 34

larger the crystal

Answer 34

faster the film speed

Question 35

t/f; faster film creates images that are less sharp due to large crystal size

Answer 35

true

Question 36

how much % reduction is f-speed compared to d-speed

Answer 36

60% reduction of the exposure time

Question 37

gives overall view of the entire dentition, both max and mand, helpful for the third molar extractions

Answer 37

panoramic film

Question 38

before taking a pan you should

Answer 38

explain procedure, place double sided apron, remove all jewelry anything that interferes

Question 39

used by orthodontists for measuring cranial growth and development

Answer 39

cephalometric film

Question 40

provides info on the head of the condyle, gelnoid fossa & articular eminence

Answer 40

tmj

Question 41

used with intensifying screen, reduces amount of radiation to patient

Answer 41

screen films

Question 42

does not require use of intensifying screen for exposure, requires more exposure time than screen film

Answer 42

non-screen films

Question 43

cassette

Answer 43

used to hold the extra-oral film and intensifying screen

Question 44

not exposed to X-rays, used only in the dark room, has emulsion on one side

Answer 44

duplicating film