Both X-ray machines and CT scanners are used to produce images of the body.

(a) The diagram shows an X-ray photograph of a broken leg.

Before switching on the X-ray machine, the radiographer goes behind a screen.

Explain why the radiographer does this.

(3 marks)

(b) The following is an extract from a newspaper article.

X-rays cause 700 new cancers each year in the UK
Each year there are about 125 000 new cancer cases in the UK, of which about 700 may be due to the use of X-rays to diagnose illness.

The article was reporting on a scientific research project first published in a medical journal.

What evidence would the scientists have collected to come to the conclusion that X-rays can cause cancer?

(2 marks)

(c) Explain the advantage of a CT scan compared to an X-ray.

(2 marks)

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From Q4 P3 AQA Specimen Paper (Higher)