| 基于GPGPU的实时结肠虚拟展平技术 |
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| 引用本文： | 钟灿,赵俊,张丹枫.基于GPGPU的实时结肠虚拟展平技术[J].计算机辅助设计与图形学学报,2011,23(2). |
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| 作者姓名： | 钟灿 赵俊 张丹枫 |
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| 作者单位： | 上海交通大学生命科学与技术院生物医学工程系,上海,200240 |
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| 基金项目： | 国家“八六三”高技术研究发展计划(2007AA02Z452) |
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| 摘 要： | 为了在结肠检查过程中实时绘制结肠内壁表面的展平图像,并动态地调整分割阈值,提出一种基于GPGPU的实时结肠虚拟展平技术.首先在结肠中心路径上每一点的切线方向建立圆柱形的光照模型,然后根据当前CT分割阈值,并通过GPGPU加速光线投射算法提取亚像素级的结肠内壁表面,最终得到局部虚拟展平的结果.实验结果表明,文中技术渲染速度达到50帧/s的实时要求,在结肠检查过程中能够通过动态地调整分割阈值获取精细的结肠内壁,提高了虚拟展平算法的适应性和准确性.
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| 关 键 词： | 实时结肠虚拟展平 体绘制 光线投射算法 GPGPU |
GPGPU Based Real-Time Virtual Colon Flattening |
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| Zhong Can,Zhao Jun,Zhang Danfeng.GPGPU Based Real-Time Virtual Colon Flattening[J].Journal of Computer-Aided Design & Computer Graphics,2011,23(2). |
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| Authors: | Zhong Can Zhao Jun Zhang Danfeng |
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| Affiliation: | Zhong Can,Zhao Jun,and Zhang Danfeng(Department of Biomedical Engineering,School of Life Sciences & Biotechnology,Shanghai Jiao Tong University,Shanghai 200240) |
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| Abstract: | This paper presents a GPGPU-based real-time virtual colon flattening method that allows dynamic modification of the CT segmentation threshold during a colon observation.First,a cylindrical lighting model is built by leveraging the tangent of each point on the colon's center line.Then a GPGPU-based ray-casting volume rendering algorithm is employed to generate the flatten colon surface according to the CT segmentation threshold of the colon's inner surface.Experimental results show that the proposed method a... |
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| Keywords: | real-time virtual colon flattening volume rendering ray-casting algorithm GPGPU |
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