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5 May 2004 Mapping the coronary arteries on a sphere in CT angiography
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Current approaches for coronary artery inspection using cardiac CT angiography scans include curved planar reformation (CPR), slab maximum-intensity projection (MIP) and volume rendering (VR) techniques. While the first two allow a detailed examination of only one vessel or a few segments of the coronary artery tree at a time, the VR techniques are not considered suitable for a thorough clinical assessment. An innovative concept of visualization aimed at revealing the entire coronary tree in a CPR-type environment is presented. The new approach uses a sphere or an ellipsoid as a base surface to map the coronary tree. Using the spherical (or ellipsoidal) coordinate system a “true” surface running through the centerlines of all the vessels is defined. Resampling the volume data with this (preferably thick) surface and using a maximum-intensity projection will produce three possible modes of visualization. In one mode the “true form” surface is texture-mapped with the resampled volume data, while in another the data is projected onto the sphere that served as a base surface, forming the “Globe” mode of visualization. Peeling the data to form a 2D “map” of the entire coronary tree in its context in the heart constitutes the third mode.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Guy A. Lavi "Mapping the coronary arteries on a sphere in CT angiography", Proc. SPIE 5367, Medical Imaging 2004: Visualization, Image-Guided Procedures, and Display, (5 May 2004);

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