Nonlinear ray tracing for vessel enhanced visualization

Feng Qiu; Wei Hong

doi:10.1117/12.911488

17 February 2012 Nonlinear ray tracing for vessel enhanced visualization

Feng Qiu, Wei Hong

Proceedings Volume 8316, Medical Imaging 2012: Image-Guided Procedures, Robotic Interventions, and Modeling; 83161N (2012) https://doi.org/10.1117/12.911488
Event: SPIE Medical Imaging, 2012, San Diego, California, United States

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.

Citation Download Citation

Feng Qiu and Wei Hong "Nonlinear ray tracing for vessel enhanced visualization", Proc. SPIE 8316, Medical Imaging 2012: Image-Guided Procedures, Robotic Interventions, and Modeling, 83161N (17 February 2012); https://doi.org/10.1117/12.911488

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