Computed tomography

A CT is an X‑ray based imaging technique in which the human body is scanned layer by layer. A computer uses the single scans to reconstruct a full image that shows the soft tissue structures of the body and reveals minor differences in tissue density caused by tumors or other tissue changes. The scans are performed in a rapidly rotating X-ray tube with a beam of rays that has nearly the diameter of a pencil. CT imaging has become a frequently used technique in radiologic diagnostics and has meanwhile replaced many invasive methods.