GCSE Questions: Medical Physics

- scanning and therapy

Q5.CT scans are used by doctors to create three-dimensional images of a patient's body.

(a)

(i) Explain why CT scans can increase the risk of cancer to the patient.

[2 marks]

(ii) Although CT scans increase the risk of cancer they are still carried out. Suggest why.

[1 mark]

(b) A child has a CT scan. Her mother stays in the room with her during the scan. Suggest one precaution that the mother should take during the scan.

[1 mark]

(c) Ultrasound can also be used to create three-dimensional images of a patient. State one advantage of using CT scans rather than ultrasound scans.

[1 mark]

[Total: 5 marks]