Sigourney's doctors think she might have a tumour, and they would like to use a brain-imaging technique that will provide them with an accurate image of her brain structure. The technique that they are most likely to use would be

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A CT scan is the best choice for providing an accurate image of brain structure in the case of a potential tumour. PET scans are better for detecting functional changes in the brain, ESB is a research tool that involves the direct application of an electrical current to the brain, and EEG recordings measure electrical activity in the brain and are not as useful for imaging brain structure.

Sigourney's Doctors Think She Might Have a Tumour, and They