Computerized tomography

Computerized Tomography (CT) is a type of imaging procedure that uses special x-ray equipment to create detailed pictures, or scans, of areas inside the body. It is also referred to as computerized axial tomography (CAT).

Overview

Computerized Tomography is a noninvasive procedure that combines the use of X-rays with computer technology to produce a detailed view of the body's organs, bones, and other tissues. The images produced by a CT scan are more detailed than those produced by conventional X-ray procedures.

Procedure

During a CT scan, the patient lies on a table that moves through a circular opening in the CT machine. An X-ray tube rotates around the patient, sending multiple beams through the body at different angles. These beams are detected by an array of sensors on the opposite side of the patient. The data collected from these sensors is then processed by a computer to produce a two-dimensional cross-sectional image of the area being examined.

Uses

CT scans are used for a variety of diagnostic and therapeutic purposes. They can help detect tumors, infections, blood clots, and fractures. They can also guide certain procedures such as biopsies, surgery, and radiation therapy.

Risks

While CT scans are generally safe, they do expose the patient to more radiation than conventional X-rays. This can increase the risk of cancer, especially in children and young adults. Other risks include allergic reactions to contrast materials and kidney damage in patients with pre-existing kidney disease.

See Also

• Magnetic Resonance Imaging
• Ultrasound
• Positron Emission Tomography
• Radiology

Computerized tomography Resources
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