To measure the attenuations of X-rays by various tissues inside the body,(C.T.TECHNICIAN COURSE IN MUMBAI) CT scanners use a revolving X-ray tube and a row of detectors arranged in a gantry. Tomographic reconstruction procedures are then used to process the many X-ray data acquired from various angles on a computer to create tomographic (cross-sectional) images (virtual “slices”) of a body. Patients who cannot utilize magnetic resonance imaging (MRI) due to metallic implants or pacemakers can still undergo a CT scan.

The development of CT scanning in the 1970s has shown it to be a flexible imaging method. Although the most common application of CT is for medical diagnosis, it can also be used to create images of inanimate objects. Allan MacLeod Cormack, a South African-American physicist, and Godfrey Hounsfield, a British electrical engineer, shared the 1979 Nobel Prize in Physiology or Medicine for “the creation of computer-assisted tomography.”