CT is performed using a specialized scanner, an x-ray system, a
patient table, and a computer workstation. The CT scanner is shaped
like a large square with a hole in the center or round like a
doughnut. X rays are produced in the form of a beam that rotates
around the patient. During a CT scan, the patient table is moved
through the center hole as x-ray beams pass through the patient's
body. The x rays are converted into a series of black-and-white
images
