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Dental Nurse > Radiography > Flashcards

Radiography Flashcards

1
Q

What is the name given to the structure which absorb x-rays and prevent them passing through?

A

Radioplaque

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2
Q

Which would not be a reason to take an x-ray?

A

To determine plaque score

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3
Q

The benefits of taking an x-Ray and using it for treatment planning or diagnosing should outweigh the risks of any tissue damage to the patient. What is this called?

A

Justification

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4
Q

Which legislation protects staff?

A

IRR99

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5
Q

Which legislation protects patients?

A

IR(ME)R2000

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6
Q

How much has the ALARA principle reduced the amount of scattered radiation in the workplace?

A

40%

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7
Q

All x-ray sets must be professionally assessed every?

A

3 years

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8
Q

What is the term used to describe the 2 metre distance around the x-ray machine during exposure?

A

Safety zone

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9
Q

How many hours of radiograph and radiation protection during one cycle of CPD must be done?

A

5 hours

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10
Q

Which x-ray film would be the best used to determine the presence of an unerupted upper canine?

A

Occlusal

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11
Q

Which x-ray film would be the best used to determine the presence of occlusal caries?

A

Horizontal bitewing

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12
Q

What type of radiograph is taken on a cephalostat machine?

A

Lateral skull

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13
Q

What do cassettes contain which reduces the exposure time needed?

A

Intensifying screens

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14
Q

What is the imagine known as on the x-ray film before it has been developed?

A

Latent

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15
Q

What colour is the safety lamp in the dark room?

A

Red

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16
Q

What is the most common reasons that an image is lost during automatic developing?

A

Rollers dirty

17
Q

How many extraoral radiographs need to be taken per week in order for a monitoring badge to be necessary?

18
Q

If the image of a tooth on a radiograph looks squashed and stunted what angulation exposure fault has occurred?

A

Foreshortening

19
Q

When mounting a radiograph where should the pimple be?

A

It doesn’t matter as long as the pimple faces out

20
Q

When the collimator is not angled central to the beam only part of the film is exposed. What is this called?

21
Q

What is the purpose of lead foil?

A

Prevents scatter radiation

22
Q

Foreshortening of image

A

Collimator to sleep

23
Q

Elongation of image

A

Collimator to shallow

24
Q

Fogged film

A

Film exposed to light

25
Q

Blank film

A

X-ray machine not switched on

26
Q

Dark image

A

Overdeveloped, developer too strong, temperature too high

27
Q

Faint image

A

Underdeveloped, developer too weak, temperature too low

28
Q

Fading image

A

Image placed in fixed for inadequate time

29
Q

Partial image

A

Film placed only partially in developer

30
Q

Blank film

A

Film placed in fixer before developer

Dental Nurse (5 decks)

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