Final answer:
A CT scan, which takes multiple X-rays to create an image, is the specialized type of X-ray used to locate a tumor within a brain.
Step-by-step explanation:
The specialized type of X-ray used to show the area where a tumor was located within a patient's brain is known as a CT (Computed Tomography) scan. CT scans involve taking multiple X-rays of a particular section of the body, including the brain. These X-rays pass through tissues of varying densities, and a computer constructs an overall image of the area being scanned. Particularly in the case of a brain tumor, as illustrated in Figure 3.26, a CT scan can show healthy brain tissue versus areas where a tumor may be encroaching. It is a valuable diagnostic tool for detecting tumors, significant brain atrophy, and other abnormalities.