A<unk>  or computed tomography scan (formerly known as computed axial tomography or<unk>  is a medical imaging technique used in radiology (x-ray) to obtain detailed internal images of the body noninvasively for diagnostic purposes. The personnel that perform<unk> s are called radiographers or radiology technologists.<unk> ners use a rotating X-ray tube and a row of detectors placed in the gantry to measure X-ray attenuations by different tissues inside the body. The multiple X-ray measurements taken from different angles are then processed on a computer using reconstruction algorithms to produce tomographic (cross-sectional) images (virtual "slices") of a body. The use of ionizing radiation sometimes restricts its use owing to its adverse effects. However,<unk>  be used in patients with metallic implants or pacemakers, for whom MRI is contraindicated. Since its development in the 1970s, CT has proven to be a versatile imaging technique. While CT is most prominently used in diagnostic medicine, it also may be used to form images of non-living objects. The 1979 Nobel Prize in Physiology or Medicine was awarded jointly to South African-American physicist Allan M. Cormack and British electrical engineer Godfrey N. Hounsfield "for the development of computer-assisted tomography".
CT scan
Fluoroscopy
Contrast CT
SAP scan
Imaging
Radiography
Exploratory surgery
Autoradiograph