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Virtual Dictionary

Computed Tomography

Computed Tomography, or CT, also known as computed axial tomography or CAT, is a form of tomographic scanner which builds images up by slices. Either the CT scanner rotates around the object, or the object is rotated inside a CT scanner. Each slice is directed straight through the object, be an emitter to a receiver on the other side. Any resistance on the way, registers as a drop in density for the receiver.

Both the sender and receiver remain diametrically opposing, as the angle is rotated slightly and another scan made. By continually rotating and making new scans, a 3D slice of the object is constructed. Then, the object is moved (or the scanner moved relative) by a slight vertical amount, and the whole process begins again.

The result is a series of slices that can be assembled into a 3D model for use elsewhere.

See Also: Tomography, Optical Tomography, Volumetric Model, Voxel-Based Morphometry, Polytomography, Tomographic Reconstruction, Tomographic Imaging, RTR, NDT

Below, we offer a selection of links from our resource databases which may match this term.

Related Dictionary Entries for Computed Tomography:

Computed Tomography



Single Photon Emission Computed Tomography





Resources in our database matching the Term Computed Tomography:

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Fast Adaptive Optics for 3D Medical Imaging
One of the greatest problems with tomography based medical scanners, is what happens when the patient moves (breathes, or pumps blood). The distortion that occurs in each slice has long been correctable, but takes a long time to correct. With near-instant correction now possible, real-time medical scanning is starting to look like a true possibility.

Toshiba's leviathan of a computed topography scanner, Aquilion ONE is an attempt to go beyond the need for multiple scanning tests. The plan is to replace x-rays, CAT scans, nuclear studies, and other visualisation based diagnosis techniques in one swoop.

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Virtual Colonography vs. Standard Colonoscopy
Virtual colonography is a relatively new field, which is completely non-invasive. A computed Topography (CT) scan is taken, where the body is invasively scanned into slices, which are then reconstituted into a 3D model of a person's colon, for a painless colonoscopy.


Industry News containing the Term Computed Tomography:

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Research published in the October 2009 issue of the Journal of Thoracic Oncology has found an effective combination of positron emission tomography (PET)/computed tomography (CT) (PET/CT) tests to diagnose lung cancer in a "fast-tracked" ...

Medtronic has partnered with Vital Images out of Minnetonka, Minnesota to bring 3D reconstructions of CT images of abdominal and thoracic aorta, and other large vessels, to improve preoperative planning and operative outcome in patients tha...

Diagnosing gout, a nasty disease involving swollen joints and often a good deal of pain, is difficult because the symptoms are often similar to various forms of arthritis. The definitive method of diagnosis is to draw fluid from a joint and...

Many of us have broken bones in our bodies at one time or another, and when this happens a healing process begins. The same was true of animals in the past, and has been well documented in all groups of dinosaurs. But how can we study and u...

Toshiba's new Aquilion ONE computed-tomography (CT) scanner could change the way doctors diagnose and treat such illnesses as stroke and heart attack, making many standard tests unnecessary.

Take heart attacks. A guy walks i...