Radiology Flashcards by Kiran Kaur

Q

Colour/size of anterior + posterior PA holder

A

Anterior - 0, blue
Posterior - 2, yellow

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Q

Colour + size of BW holder

A

2, red

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Q

Function of rectangular collimation

A

Decreases dose

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Q

Function of spacer cone

A

Controls fsd (ideally >200)

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Q

IRMER principles for X-rays

A

Justification + dose ALARP

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Q

Radiographic report

A

DA
Type
Teeth/restos present
Dose
ABC

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Q

How often is QA of receptors carried out

A

Every 3mths

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Q

What is assessed during QA of receptors

A

Receptor
Image uniformity
Image quality

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Q

Xray errors can be categorised into what groups

A

Technique
Exposure
Processing

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Q

Cause of blurry image

A

Film,pt, tube head movement

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Q

Cause of double image

A

Film re-exposed

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Q

Cause of tire track image

A

Reversed film

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Q

Cause of dot artefact

A

Identification dot incorrect placmeent

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Q

Cause of black line

A

Bending film

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Q

Cause of elongated image

A

Film placed too flat

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Q

Cause of shortened image

A

Film placed too steep

Q

Cause of dark image

A

Overexposed
Overdeveloped (high temp/conc/time)

Q

Cause of light image

A

Underexposed
Underdeveloped (low temp/conc/time)

Q

Cause of coning off

A

Tubehead too high or incorrect assembly of holder

Q

Cause of overlapping contacts

A

Film not parallel to teeth
Incorrect horizontal angulation