Structural Imaging Techniques (CT and MRI) CT (left) and MRI (right) scans are used to provide information about the structure of the brain and can help to spot tumours and other kinds of damage. Each scan shown here provides a snapshot of a single slice in the brain. Note that the MRI scan provides a clearer, higher-resolution image than the CT scan (see the text for further discussion of how these images are constructed and what they depict).

CUSTOM MEDICAL STOCK PHOTO and NEIL BORDEN/SCIENCE SOURCE