Computed Tomography (CT), also known as computerized tomography or computed axial tomography (CAT). Computed Tomography is an advanced X-ray technology that produces a sequence of detailed cross-sectional images of the head, spine, chest, abdomen or other areas of the body. The complex images are produced by rotating a focused X-ray beam around the patient and taking these X-ray images from numerous angles, guided by a computer. CT examinations produce detailed organ studies by capturing multiple individual images "slices."