Brain scans are diagnostic tests performed to obtain images of the brain using various imaging techniques. There are several synonyms for the term brain scan, including neuroimaging, brain imaging, cerebral imaging, and cranial imaging. These imaging techniques allow physicians and researchers to visualize the structure, function, and activity of the brain, making it an important tool in diagnosing and treating various neurological conditions such as epilepsy, stroke, Alzheimer's disease, and brain tumors. A variety of imaging techniques are used for brain scans which include CT scan, MRI scan, PET scan and SPECT scan. The various types of scans can provide different viewpoints of the brain, offering various insights into the brain's functioning.