The Full form of CT is Computed Tomography Scan. CT scan, formerly known as a computerized axial tomography scan or CAT scan makes use of computer-processed combinations of many X-ray measurements taken from different angles to produce tomographic (cross-sectional) images (virtual “slices”) of specific areas of a scanned object, allowing the user to see inside the object without cutting. The CT scan can reveal anatomic details of the internal organs of the human body that cannot be seen in conventional X-rays. The X-ray tube spins rapidly around the patient’s body and the X-rays strike numerous detectors after passing through the body. These detectors are connected to sophisticated computers which generate images after image processing. The radiation dose of a CT scanner is much higher than a conventional X-ray, but the information obtained from a CT scan is often much greater. CT scans are performed to analyze the internal structures of various parts of the human body. This includes tumors, the head, where traumatic injuries (such as blood clots or skull fractures), and infections can be identified. In the spine, the bony structure of the vertebrae can be accurately defined, as can the anatomy of the intervertebral discs and spinal cord.