Volumetric applications for spiral CT in the thorax

Geoffrey D. Rubin M.D.; Sandy Napel; Ann N.C. Leung

doi:10.1117/12.174409

1 May 1994 Volumetric applications for spiral CT in the thorax

Geoffrey D. Rubin M.D., Sandy Napel, Ann N.C. Leung

Proceedings Volume 2168, Medical Imaging 1994: Physiology and Function from Multidimensional Images; (1994) https://doi.org/10.1117/12.174409
Event: Medical Imaging 1994, 1994, Newport Beach, CA, United States

Abstract

Spiral computed tomography (CT) is a new technique for rapidly acquiring volumetric data within the body. By combining a continuous gantry rotation and table feed, it is possible to image the entire thorax within a single breath-hold. This eliminates the ventilatory misregistration seen with conventional thoracic CT, which can result in small pulmonary lesions being undetected. An additional advantage of a continuous data set is that axial sections can be reconstructed at arbitrary intervals along the spiral path, resulting in the generation of overlapping sections which diminish partial volume effects resulting from lesions that straddle adjacent sections. The rapid acquisition of spiral CT enables up to a 50% reduction in the total iodinated contrast dose required for routine thoracic CT scanning. This can be very important for imaging patients with cardiac and renal diseases and could reduce the cost of thoracic CT scanning. Alternatively, by combining a high flow peripheral intravenous iodinated contrast injection with a spiral CT acquisition, it is possible to obtain images of the vasculature, which demonstrate pulmonary arterial thrombi, aortic aneurysms and dissections, and congenital vascular anomalies in detail previously unattainable without direct arterial access.

Citation Download Citation

Geoffrey D. Rubin M.D., Sandy Napel, and Ann N.C. Leung "Volumetric applications for spiral CT in the thorax", Proc. SPIE 2168, Medical Imaging 1994: Physiology and Function from Multidimensional Images, (1 May 1994); https://doi.org/10.1117/12.174409

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