Radiography Flashcards Preview

clinical practise 2 > Radiography > Flashcards

Flashcards in Radiography Deck (23):
1

what is a radiograph?

an image produced by x-rays passing through an object and interacting the the photographic emulsion on a film.

2

why are radiographs useful?

they allow us to look inside the body, particularly at the mineralised tissues. Other advanced techinques allow us to look at soft tissue aswell.

3

what dose is from a panoramic? and how many days does it last?

-4-30 microSv
-1-3 days

4

what dose from a periapical? and over how many hours/days?

-1-8.3 microSv
-8-40 hrs

5

how many intra oral examinations are taken each year roughly?

over 10 million

6

how many panoramic x-rays are taken each year roughly?

over 3 million

7

what does the term 'somatic' mean?

-affecting those iradiated

8

do deterministic effects of radiation occur in dentistry?

-No
-only non-deterministic effects occur

9

what does ALARP stand for?

As Low As Reasonably Possible

10

what are some warnigng signs that a radiograph is about to be taken?

-visible light and audible noise when x-rays produced
-operator should be able to prevent access to controlled area
-control panels/switches are outside the control area

11

why might a peri-apical be taken?

-detect apical inflammation
-assess perio problems
-trauma/fractures
-tooth morphology pre-extraction
-presence/position of unerupted teeth
-endodontics
-pre/post apical surgery
-eruption of implants

12

what are the two techniques of taking a periapical?

-paralleling
-bisected angle

13

name 4 different image receptors

-direct film
-indirect film
-DR (CCD or CMOS)
-CR (PSP)

14

what receptor sizes are used for bitewings?

0,1,2

15

what receptor sizes are used for young children?

0,1

16

what receptor size for adults anterior are used?

1

17

what receptor size for adult posterior periapical is used?

2

18

what receptor size is used for occlusals?

4

19

how is human error reduced?

-introducing simpler systems
-improve working enviroment
-encourage reporting without blame

20

what are the two legislations for radiography

-IR(ME)R 200 -protects the pt
-IRR 99 -protects staff and public

21

is caries on a radiograph over or underestimated?

underestimated

22

what is the dose of exposure for a dental x-ray?

0.005mSv

23

what is the does of of exposure from 100g Brazil nuts?

-0.01mSv