Unit 307 - Radiography Flashcards Preview

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Flashcards in Unit 307 - Radiography Deck (52):
1

ionisation is

splitting an atom into two

2

splitting an atom into two is known as

ionisation

3

somatic effects are

direct to the individual

4

effects which are direct to the invidivual are known as

somatic effects

5

genetic effects are

effects passed down from the previous generation

6

effects passed down from the previous generation are known as

genetic effects

7

teratogenic effects

effect on the offsprings offspring

8

an effect on the offsprings offspring is known as

teratogenic effect

9

acute effects are

effects which have immediate onset

10

effects with immediate onset are called

acute effects

11

stochastic effect

effects that happen by chance

12

effects that happen by chancce

stochastic effects

13

chronic effects are

where the symptoms take a long time to appear

14

deterministic effect

 effect which can be determined definitely

15

RPS stands for 

radiation protection supervisor (who is on site)

16

RPA stands for

radiation protection advisor (an external body)

17

IRR stands for

ionising radiation regulations

18

IR(ME)R stands for

ionising radiation regulations for medical exposures

19

personal dosimetry badge is

worn to measure the level of radiation exposure

20

this is worn to measure the dosage of radiation exposure

personal dosimetry badge

21

personal dosimetry badge should be worn when 

50 OPTs and/or 100 intraoral xrays are taken each week

22

NRPB stands for

national radiation protection board

23

OPT/OPG stands for

orthopantomograph

24

a step wedge or coin test would be used for

a test xray

25

a grade 2 xray is 

diagnostically acceptable

26

27

effects from radiation exposure in large dosage in a short time (eg. Hiroshima) are known as

acute effects

28

symptoms of acute radiation effects (4)

 vomiting, skin burns, loss of hair or changes to blood cells

29

radiation effects which can be from up to 20 years and are impossible to determine the cause

chronic effects

30

radiation effects which can be directly related to a cause (eg. sunburn)

somatic deterministic effects

31

chronic radiation effects

can be from up to 20 yrs of exposure history and are impossible to determine the cause

32

somatic deterministic radiation effects

radiation effects which can be directly linked to a cause (eg. sunburn)

33

effects of radiography which can lead to death or deformity of foetus are known as

genetic stochastic effects

34

example of genetic stochastic radiation effects 

death or deformity of foetus

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somatic stochastic radiation effects are

effects which can be related to a cause but not definitely (eg. cancer, increased exposure to radiation due to job or unknown exposure)

36

radiation effects which can be determined but are not clear in relation to the cause are known as

somatic stochastic effects

37

time and temperature which radipgraphs should be exposed to fixer and developer solutions

3-4 minutes at 18-24degrees celcius

38

solution which chemically reduces the energised ionised silver bromine crystals

developing solution

39

solution which removes silver bromide crystals

fixer solution

40

failure to rinse crystals from radiograph leads to 

image going green/brown

41

after being exposed to appropriate solutions, radiograph should be rinsed

under running water for 10-15 seconds (as close in temperature as possible to other solutions)

42

periapical xray

xray taken of roots

43

bitewing

xray taken of crown and partial root 

44

occlusal radiograph

xray taken of one full arch

45

orthopantomograph (OPG/OPT)

xray taken of full dentition

46

lateral oblique xray

xray taken from side of jaw

47

cephalostat (lateral projection) 

xray taken of full jaw, neck and skull

48

how far should the operator stand from the xray tube

1.5 meters

49

which speed film should ideally be used to reduce exposure 

E-F films

50

solid state sensors allow for

immediate viewing of xrays and are directly connected to the computer

51

photostimulable phosphur storage plates are used for

indirect processing of xrays and must be read/scanned before being loaded onto the computer

52