Computed Tomography scan scan is abbreviated as CT scan. It is a combination of computer processes and X-ray imaging system which helps to generate cross-sectional images of the organs being scanned. This helps us to understand the inner side of the organ as if in cut sections. Adding digital geometry processing to the CT scan helps us in finding volumes of the organs being scanned by taking continuous radiographs around a single rotational axis. CT scan further is of many types such as Positron Emission Tomography, Single Photon Emission Computed Tomography. CT scan has both diagnostic and therapeutic uses.