Which imaging method uses X-rays from different angles to create a composite image?

• A. CAT Scan
• B. MRI
• C. PET Scan
• D. EEG

Answer: (A)

Images created by combining X-rays taken from multiple angles are produced by computed tomography, or a CAT scan. The machine rotates around the body and gathers many X-ray measurements from different viewpoints, and a computer stitches them together into cross-sectional slices that form a detailed composite image of internal structures. This technique is especially good for seeing both bone and soft tissue in one detailed view. It differs from MRI, which uses magnetic fields and radio waves to image soft tissues; from PET scans, which use radioactive tracers to show metabolic activity; and from EEG, which records the brain’s electrical activity rather than producing body images.