CT scanning

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computed tomography

A diagnostic imaging technique in which multiple X-rays are taken from different angles in a single plane and a series of two-dimensional images (”slices”) of the different tissue densities—e.g., fat, muscle, bone, etc.—is constructed by computer. In contrast to conventional radiology, CT results in a 1000-fold increase in image resolution, and can pinpoint lesions < 2 mm in greatest dimension; dyes may be injected IV to increased resolution of abnormal tissue and blood vessels, or radiocontrast can be used for dynamic testing.

CT scanning

Computer-assisted tomography. An important method of internal X-ray scanning in which an image is built up by a computer from the data derived by analyzing and correlating the output from thousands of separate, serial, low-intensity readings, taken in successive thin planes. The radiation source is mounted on an arm that moves, between exposures, in a helix, and the radiation detector maintains a constant relationship to the source. Images can be reconstructed from the stored readings so as to appear in any desired plane or orientation. A recent development is spiral scanning that greatly speeds up the process and allows a complete chest scan within a single breath-hold. Also known as CAT scanning.

CT scanning

Computer tomography scanning is a diagnostic imaging tool that uses x rays sent through the body at different angles.
Mentioned in: Apraxia

Patient discussion about CT scanning

Q. I get bad headaches had ct scans and m.r.i. even sinus surgery, suffering 2yrs now, dizzness occurs too..

A. If all prior medical investigations turned out normal, and sinus surgery didn't help relieve your symptoms, I would suggest the reason for your headaches is probably migraine attacks, that can cause severe headaches, and no CT scan or MRI can diagnose them. The diagnosis is made clinically, by your doctor. Migraine headaches can be eased by proper medications, before and during an attack. You should consult a neurologist.

More discussions about CT scanning
References in periodicals archive ?
Just as color maps can be generated for a "part-to-CAD" comparison, CT scanning is convenient for "part-to-part" comparisons.
Robinson Murphy Solicitors is able to offer a CT scanning service and deals with all claims on a no win, no fee basis.
A total of 301 patients with suspected meningitis were studied; 235 underwent CT scanning.
The following experts in CT scanning technology, lung cancer imaging or ISP are available to reporters and editors:
Villeneuve of the National Research Council of Canada in Ottawa and his colleagues devised quantum CT scanning.
Goldenberg stated: "Our clinical trials have indicated, in cases like this, that one RAID scan was able to locate different cancer sites that otherwise would have required at least two conventional tests, such as CT scanning and bone scanning, to arrive at the same conclusion.
Any cancers that might stem from radiation in whole-body CT scanning aren't likely to appear for years or decades.
The findings suggest that CT scanning isn't yet reliable enough for replacing colonoscopy for polyp detection, says study coauthor Peter B.
Principles and potential applications of volumetric CT scanning are being evaluated at MGH with this prototype system.
used a CT scanner to generate three-dimensional images of the colon, an emerging technique that seems to be more accurate than typical two-dimensional CT scanning.
CT scanning looks deep inside the body with low-dose X rays and has been used for decades to pinpoint the problems behind patients' symptoms.