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Radiology. 1993 Dec;189(3):647-56.

Spiral (helical) CT.

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Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, MO 63110.


Spiral (helical) computed tomography (CT) involves continuous patient translation during x-ray source rotation and data acquisition. As a result, a volume data set is obtained in a relatively short period of time. For chest or abdominal scanning, an entire examination can be completed in a single breath hold of the patient or in several successive short breath holds. The data volume may be viewed as conventional transaxial images or with multiplanar and three-dimensional methods. The authors review the technologic aspects of spiral CT, as well as its advantages, limitations, and current clinical applications.

[Indexed for MEDLINE]

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