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The CT Scan is a primary tool for diagnostic medicine. Popularly called "Cat Scan," the CT Scan employs radiology, and is a technical application that is constantly advancing with improvements in computer technology. The basic CT Scan (computerized tomography) incorporates uniquely designed x-ray equipment. It allows rotation of 360 degrees of exposure around the human body.

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The CT scanning method provides the physician with a two-dimensional "slice" of a designated target area in the patient's body, as positioned on the examining table. Details and structure of the interior of the body can be mathematically reconstructed from the projections obtained from various angles. In computerized tomography the views are taken in a single plane, data is computed and displayed as a cross-sectioned image.

These images from the x-ray exposures are then recorded and stored in the computer. Data may then be reconstructed and the brightness of each portion of the cross-section is determined by x-ray absorption. The images taken may be displayed, recorded on film, or stored for later review.

Basic CT Scan shows the area covered on a single frame. If more area needs examination the patient and the table are moved accordingly. This process is called "incremental" scanning and it limits the frames to specific sections as chosen. It is generally time consuming due to the multiple adjustments that are needed with both patient and equipment.

Long regarded as reliable and effective methods for examining "inner-space," Cat Scans have allowed physicians and radiologists to detect disease and physical abnormalities without invasive procedures.

In recent years physicians and specialists have prescribed CT Scans more and more frequently. They are often prescribed for evaluation of cranial problems. In medical emergency situations "Cat Scans" are the "test of choice" in all injury situations.

Other applications include:

• Lung examinations for obstructions and tumors
• Heart disease and many stages of cardiac illness
• Arterial obstructions and aortic damage
• Spinal abnormalities such as herniated discs
• Detection of internal organ diseases.

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