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Proceedings Paper

Two-alternative forced-choice evaluation of 3D CT angiograms
Author(s): Damiaan F. Habets; Brian E. Chapman; Allan J. Fox; Derek E. Hyde; David W. Holdsworth
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Paper Abstract

This study describes the development and evaluation of an appropriate methodology to study observer performance when comparing 2D and 3D angiographic techniques. 3D-CT angiograms were obtained from patients with cerebral aneurysms or occlusive carotid artery disease and perspective rendering of this 3D data was performed to produce maximum intensity projections (MIP) at view angles identical to digital subtraction angiography (DSA) images. Two-alternative-forced-choice methodology (2AFC) was then used to determine the percent correct (Pc), which is equivalent to the area Az under the receiver-operating characteristic (RTOC) curve. In a comparison of CRA MIP images and DSA images of the intracranial vasculature, the average value of Pc was 0.90+/- 0.03. Perspective reprojection produces digitally reconstructed radiographs (DRRs) with image quality that is nearly equivalent to conventional DSA, with the additional clinical advantage of providing digitally reconstructed images at an unlimited number of viewing angles.

Paper Details

Date Published: 26 June 2001
PDF: 9 pages
Proc. SPIE 4324, Medical Imaging 2001: Image Perception and Performance, (26 June 2001); doi: 10.1117/12.431188
Show Author Affiliations
Damiaan F. Habets, John P. Robarts Research Institute/Univ. of Western Ontario (Canada)
Brian E. Chapman, Univ. of Pittsburgh (United States)
Allan J. Fox, London Health Sciences Ctr./Univ. of Western Ontario (Canada)
Derek E. Hyde, John P. Robarts Research Institute/Univ. of Western Ontario (Canada)
David W. Holdsworth, John P. Robarts Research Institute/Univ. of Western Ontario (Canada)

Published in SPIE Proceedings Vol. 4324:
Medical Imaging 2001: Image Perception and Performance
Elizabeth A. Krupinski; Dev Prasad Chakraborty, Editor(s)

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