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Proceedings Paper

Nonlinear ray tracing for vessel enhanced visualization
Author(s): Feng Qiu; Wei Hong
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Paper Abstract

3D visualization of angiography data is an important preprocessing step in diagnosis of vascular disease. This paper describes an efficient volume rendering method to emphasize feature-rich region (or focus) in the 3D angiography data. The method takes the input 3D angiography data and computes the focus with user specification or certain feature extraction algorithms. Then, a distance map is constructed based on the description of the focused region(s). While rendering the 3D angiography data, the nonlinear ray tracing method is used and the gradient of the distance volume is applied to guide ray marching. In the result image, the focused region(s) appears larger than in the normal ray-casting image, while the context (other regions of the volume) can be still preserved in the image (maybe displayed in a shrink size). This method avoids deforming the original volume to magnify focus regions, which is expensive to compute, thus improves the performance.

Paper Details

Date Published: 17 February 2012
PDF: 7 pages
Proc. SPIE 8316, Medical Imaging 2012: Image-Guided Procedures, Robotic Interventions, and Modeling, 83161N (17 February 2012);
Show Author Affiliations
Feng Qiu, Siemens Corporate Research (United States)
Wei Hong, Siemens Corporate Research (United States)

Published in SPIE Proceedings Vol. 8316:
Medical Imaging 2012: Image-Guided Procedures, Robotic Interventions, and Modeling
David R. Holmes III; Kenneth H. Wong, Editor(s)

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