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 ?
All these patients underwent non contrast enhanced helical computed tomography (CT) scan.
The frequencies of various secondary signs of ureterolithiasis detected on unenhanced helical computed tomography are expressed as percentages in table 2.
Helical computed tomography (Asteion - Toshiba) was used for all patients.
Helical computed tomography of the neck with contrast infusion detected a possible vascular hemangioma in the right posterior lateral wall of the subglottic region.
Can noncontrast helical computed tomography replace intravenous urography for evaluation of patients with acute urinary tract colic?
Helical computed tomography (CT) of the neck and chest with three-dimensional reconstruction detected an abnormal communication between the trachea and the esophagus that was consistent with a tracheoesophageal fistula.
Although these studies have used excretory urography (IVP) as the reference standard, noncontrast helical computed tomography (CT) appears to be a superior reference standard.