Radiology, Vol 206, 823-829, Copyright © 1998 by Radiological Society of North America

ARTICLES

Measurement of the aorta and its branches with helical CT

GD Rubin, DS Paik, PC Johnston and S Napel
Department of Radiology, Stanford University School of Medicine, CA 94305-5105, USA.

Contiguous orthonormal arterial cross sections, segment lengths, and curvature were semiautomatically quantified from helical computed tomographic (CT) angiographic data in phantoms and two patients. Measurements of mean diameter and curvature correlated with reference values (r2 = .99), and mean fractional errors were 0.07 and 0.06 for mean diameter and curvature measurements, respectively. Volumetric measurement showed a potential to increase the accuracy, precision, and diagnostic utility of CT angiography.

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