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| 一种基于光场的数字重建影像快速生成算法 | |
| 引用本文： | 刘鹏,高军,雷勋祖,周凌宏.一种基于光场的数字重建影像快速生成算法[J].南方医科大学学报,2007,27(10):1537-1539. |
| 作者姓名： | 刘鹏 高军 雷勋祖 周凌宏 |
| 作者单位： | 1. 解放军第一八一医院医学工程科,广西,桂林,541002 2. 解放军第一八一医院CT室,广西,桂林,541002 3. 南方医科大学生物医学工程学院,广东,广州,510515 |
| 摘 要： | 数字重建影像(DRRs)是图像引导放射治疗(IGRT)中一项关键技术,它广泛应用于2D-3D图像配准中,用来确定病人在治疗期间的位移误差.因为传统的DRRs重建算法一光线跟踪法生成速度慢,所以它是整个配准过程的瓶颈.本文对计算机图形学的光场重现理论进行延伸,用光线跟踪法建立光场,再插值重建任意视点的DRRs图像.由于许多计算在预处理阶段完成,所以大大的提高了DRRs图像的生成速度(85 ms),并得到令人满意的图像效果. |
| 关 键 词： | 数字重建影像 光场 图像引导放射治疗 |
| 文章编号： | 1673-4254（2007）10-1537-03 |
| 修稿时间： | 2007-08-18 |
A light field-based fast computation of digitally reconstructed radiographs |
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| LIU Peng,GAO Jun,LEI Xun-zu,ZHOU Ling-hong.A light field-based fast computation of digitally reconstructed radiographs[J].Journal of Southern Medical University,2007,27(10):1537-1539. | |
| Authors: | LIU Peng GAO Jun LEI Xun-zu ZHOU Ling-hong |
| Institution: | 1Department of Medical Engineering, 2Department of CT, 181 Hospital of PLA, Guilin 541002, China; 3School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China |
| Abstract: | Generation of digitally reconstructed radiographs(DDRs)is key to image-guided radiation therapy and widely used for 2D-3D image registration to verify the patient's position.The classic algorithms to generate DRRs with ray casting is time consuming to hamper the registration process.The authors describe the attempt to extend the light field rendering techniques from computer graphics,using the light field computed from ray casting to interpolate a DRRs image from a novel fixed viewpoint.Because most of the computation is performed in a preprocessing step,the speed is greatly accelerated and satisfactory DRRs can be obtianed. |
| Keywords: | digitally reconstructed radiographs light field image-guided radiation therapy |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |