CT値再配置によるX線CTのボリュームレンダリングの研究

概要

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Concernig with X-ray CT images of the head, it is difficult to correctly classify regions of fields sa the brain or skin, as the CT-value distributions for these tissues overlap. We present a method of separating the distributions, allowing brain tissue to be distinguished from skin and other tissues, by selectively shifting brain CT values in histogram space. We briefly describe the volume rendering process, and in particular theclassification step (corresponding to the segmentation step in convensional surface rendering) in which our new algorithm is implemented. The algorithm separates brain regions from other areas using image masking. Shifting the CT values of these regions in histogram space then allows brain regions to be distinguished from other regions. Finally, in order to demonstrate the effectivenes of the algorithm, we present rendered images based on head X-ray CT images.
東海大学の論文
1997-03-30