CAT scan


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Related to CAT scan: CT scan, MRI scan

CAT scan

(kăt) [computerized axial tomography], X-rayX ray,
invisible, highly penetrating electromagnetic radiation of much shorter wavelength (higher frequency) than visible light. The wavelength range for X rays is from about 10−8 m to about 10−11
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 technique that allows relatively safe, painless, and rapid diagnosis in previously inaccessible areas of the body; also called CT scan. An X-ray tube, rotating around a specific area of the body, delivers an appropriate amount of X radiation for the tissue being studied and takes pictures of that part of the internal anatomy from different angles. More recent scanners have a stationary X-ray tube and use deflecting coils and special reflectors to position the X-ray beam. A computer program is then used to form a composite, readable image. CAT scanning has revolutionized medicine, especially neurology, by facilitating the diagnosis of brain and spinal cord disorders, cancercancer,
in medicine, common term for neoplasms, or tumors, that are malignant. Like benign tumors, malignant tumors do not respond to body mechanisms that limit cell growth.
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, and other conditions. Ultrafast CT, or electron beam CT, is able to take pictures in a tenth of a second. It is useful in creating images of moving parts, such as the heart, without blurring.

CAT scan

[′kat ‚skan]
(medicine)
An image of a sectional view of a portion of the body made by computerized tomography.

CAT scan

(Computer Axial Tomography) A series of X-rays that show the human body in slices. The X-ray mechanism, which surrounds the body, "inches" its way along the area being examined, taking multiple tomograms (slices). The computer is used to turn the tomograms into pictures. See tomography.
References in periodicals archive ?
Bili gets his CAT scan with Dr Rhys Jones, right of picture <B
The 64-slice CAT scan takes thousands of images of the heart in just a few seconds, allowing a cardiologist to see detailed images of a patient's heart and how it is functioning.
Based on the same technology used in hospital CAT scans, computed tomography makes it possible to see inside metal objects without destroying them.
Tumors in the chest and abdomen move with respiration and are good candidates for 4D CAT scan simulation.
That must be reassuring to the 697 vets who had MRIs and CAT scans at Sepulveda in the first six months of this year.
Repeated CAT scans, clinical symptoms, and serial C-reactive protein levels indicated rapid regression of the abscess followed by complete cure.
John Bair, CEO and President of PDSi, commented, "Our order from Picker is the culmination of two and one half years of planning and design using high- tech Sun Microsystems products to achieve a product that can be both retrofitted on existing Picker CAT Scans and incorporated in new units.
To get the scans, doctors slid the mummy--case and all--into the large hole of a CAT scan machine (inset).
Before surgery, a CAT scan generates a detailed three-dimensional map of the target.
Maggette will be taking a CAT scan on his sprained left foot, and Ross will be receiving an epidural to alleviate back spasms.
With data taken from a CAT scan, the "head" was rapidly reconstructed layer by layer.
The plan also calls for adding a second cardiac catheterization laboratory along with a recovery area and patient holding room, and relocating MRI and CAT scan equipment from a satellite building into the hospital, Mirzabegian said.