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CT (CAT scanning)
Computed tomography (also known as CT or CAT scanning) uses special equipment to obtain multiple cross-sectional images of the organs and tissues. CT produces images that are far more detailed than a regular X-ray. CT is especially useful because it can simultaneously show many different types of tissue, including the lungs, heart, organs, bones, soft tissues, muscle and blood vessels. Modern CT scans use a method called spiral (or helical) multi-slice CT that captures images from many angles and, with the aid of a computer, processes the images to create cross-sectional pictures or "slices" of the specific area. The images then can be printed or examined on a monitor.
CT scanning is considered to be a "patient-friendly" procedure because it involves relatively low radiation exposure and is not invasive. Contrast material is sometimes injected through a vein to get a better image of the blood vessels, soft-tissues and organs. During the CT examination patients usually lie flat on their back, but occasionally they may be asked to lie on their side or on their stomach. Sometimes patients are asked to hold their breath for a short time.
