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 ?
ICScreen's goal is to modernize and standardize the administration of spiral CT scanning and quantify with empirical data the number of lives saved by this screening process in order to increase the use of CT scanning in the future.
The enhanced measurement capabilities of CT scanning provide the information designers and engineers need to revise processes or remake molds.
In the first instance, CT scanning can serve to confirm or exclude the presence of an organic cause for the clinically identified neurological abnormality.
The CT scanning process is completely painless and the results are known within a matter of weeks.
A recent study evaluated clinical presentation prior to CT scanning in patients suspected of having meningitis.
CT scanning was surpassed by a new technology, the MRI scan, which showed the brain in greater detail.
Physicians using broader criteria in the selection of patients with headache for CT scanning may find the need to be selective in their decision about which abnormalities to pursue in such patients once the CT scan reports have been received.
CT scanning is a medical technology that uses X-rays and sophisticated software to create high-resolution, 3-D images of the internal physiology of the human body.
Industrial CT scanning is similar to the medical procedure, and dental technology, except for the energy level of the x-rays used and the level of detail that can be resolved.
The goal of implementing such guideline is to do CT scan only in those who are at risk of developing complications thus minimizing the cost of CT scanning as well as strain on emergency neurology and radiology departments.
Similar scenes occur daily at thousands of hospitals in which computerized tomography, or CT scanning, has become a mainstay of medical diagnosis.