helical computed tomography


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Related to helical computed tomography: spiral scan, spiral computed tomography

spi·ral com·put·ed to·mog·ra·phy

computed tomography in which the x-ray tube continuously revolves around the patient, who is simultaneously moved longitudinally; computer interpolation allows reconstruction of standard transverse scans or images in any preferred plane.

helical computed tomography

computed tomography that combines continuous gantry rotation with continuous table movement to form a helical or spiral path of scan data. Because this method scans a volume of tissue rather than a series of individual slices of tissue, small lesions can be easily detected. Also called spiral computed tomography.

helical computed tomography

Computed tomographic (CT) images that are obtained as the CT table moves continuously during a single, held breath. Detailed evaluation of dynamic internal features is feasible with this technique.
Synonym: spiral computed tomography
See also: tomography
References in periodicals archive ?
The National Lung Screening Trial (NLST) compared two ways of detecting lung cancer: low-dose helical computed tomography (CT) and standard chest X-ray.
Value of helical computed tomography in the management of upper esophageal foreign bodies.
4, 2010 /PRNewswire-USNewswire/ -- The National Cancer Institute (NCI) released initial results from a large-scale clinical trial evaluating whether lung cancer screening with low-dose helical computed tomography (CT) or standard chest X-rays saves lives.