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28 May 2001 Volumetric subtraction angiography for image-guided therapy
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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.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Derek E. Hyde, Allan J. Fox, Terence M. Peters, Stephen P. Lownie, Damiaan F. Habets, and David W. Holdsworth "Volumetric subtraction angiography for image-guided therapy", Proc. SPIE 4319, Medical Imaging 2001: Visualization, Display, and Image-Guided Procedures, (28 May 2001);

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