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Proceedings Paper

Volumetric subtraction angiography for image-guided therapy
Author(s): Derek E. Hyde; Allan J. Fox; Terence M. Peters; Stephen P. Lownie; Damiaan F. Habets; David W. Holdsworth
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Paper Abstract

Our goal is to improve the visualization of the intracranial vasculature during interventional procedures where radiographically dense objects would normally hinder clinical assessment. We describe our technique of Volumetric Subtraction Angiography (VSA), which removes bone, metal objects, and associated artifacts from the 3D contrast-enhanced image of the patient's vasculature. This work utilizes a prototype Computed Rotational Angiography (CRA) system that uses a C-arm mounted x-ray image intensifier to acquire 2D projections of the vasculature. A modified cone-beam computed tomography (CT) algorithm is then used to reconstruct a 3D image with isotropic voxels. Two volumes of data are acquired, and the anatomical mask is volumetrically subtracted (voxel-by-voxel) from the intra- arterial, contrast-enhanced image, producing a 3Dangiogram.

Paper Details

Date Published: 28 May 2001
PDF: 8 pages
Proc. SPIE 4319, Medical Imaging 2001: Visualization, Display, and Image-Guided Procedures, (28 May 2001); doi: 10.1117/12.428055
Show Author Affiliations
Derek E. Hyde, John P. Robarts Research Institute and Univ. of Western Ontario (Canada)
Allan J. Fox, London Health Sciences Ctr. and Univ. of Western Ontario (Canada)
Terence M. Peters, John P. Robarts Research Institute and Univ. of Western Ontario (Canada)
Stephen P. Lownie, London Health Sciences Ctr. and Univ. of Western Ontario (Canada)
Damiaan F. Habets, John P. Robarts Research Institute and Univ. of Western Ontario (Canada)
David W. Holdsworth, John P. Robarts Research Institute and Univ. of Western Ontario (Canada)


Published in SPIE Proceedings Vol. 4319:
Medical Imaging 2001: Visualization, Display, and Image-Guided Procedures
Seong Ki Mun, Editor(s)

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