Peter went out cycling one morning. He was not wearing a helmet. He fell off a ridge and fell into a steep valley. Apart from fracturing his arm and acquiring several bruises, Peter severely injured his head. The doctor noticed a swelling on the right side of his head and suspected that it was a blood clot. Which of the following did the doctor use to obtain a three-dimensional image of Peter's brain for further investigation?

Question

Quizplus · Accepted Answer

The doctor would have used a CT scan (computerized axial tomography), which uses X-rays to produce a 3D image of the brain. PET (positron emission tomography) scans are used to measure brain activity, EEG (electroencephalography) measures brain waves, and ECG (electrocardiography) measures heart activity. None of these would be suitable for investigating a suspected blood clot in the brain.

Peter Went Out Cycling One Morning