Final answer:
CT scan is a medical imaging technique used to identify brain abnormalities such as cysts, tumors, or hemorrhages.
Step-by-step explanation:
A CT scan is a medical imaging technique that involves taking multiple x-ray images of a particular section of a person's body or brain. These x-rays pass through tissues of different densities at different rates, allowing a computer to construct an overall image of the scanned area. In the context of occipital and intraventricular hyperintensities, CT scans can help identify abnormalities such as cysts, tumors, or hemorrhages within the brain.
For example, when neurocysticercosis is present, CT scans can reveal numerous cysts in the brain. Additionally, in the case of a hemorrhagic stroke, CT scans can show intraparenchymal hemorrhage within specific lobes of the brain. However, it's essential to consult a medical professional for an accurate diagnosis and interpretation of CT scan results.