SPECT中非均匀衰减扇束投影的局部重建问题研究
PDF下载 (323)沈正洁,王金平 *.SPECT中非均匀衰减扇束投影的局部重建问题研究[J].宁波大学学报(理工版),2016,29(4):61-66.DOI:
SHEN Zheng-jie,WANG Jing-ping *.Local Reconstruction of Nonuniform Attenuated Fan-beam Projection in SPECT[J].Journal of Ningbo University(Natural Science & Engineering Edition),2016,29(4):61-66.DOI:
| Title: | Local Reconstruction of Nonuniform Attenuated Fan-beam Projection in SPECT |
| 作者: | 沈正洁, 王金平 * |
| Author(s): | SHEN Zheng-jie, WANG Jing-ping * |
| 关键词: | 非均匀衰减; 衰减Radon变换; 感兴趣区域; 局部重建 |
| Keywords: | nonuniform absorption; attenuated Radon transform; region of interest; local image reconstruction |
| 分类号: | R311 |
| 文献标识码: | A |
| 摘要: | 通过将Natterer的结果推广到具有复系数的AtRT(衰减Radon变换)和应用针对ROI(感兴趣区域)的扇束扫描模式中, 得到平行束扫描几何中具有复系数的AtRT(衰减Radon变换)的明确反演公式, 以及SPECT(单光子发射计算机断层)中非均匀衰减扇束投影的精确局部重建公式. 重建结果基于平行束与扇束之间的坐标变换. |
| Abstract: | In this work, the inversion formula of the nonuniform attenuated Radon transform (AtRT) with complex coefficients in parallel-beam geometry, and the local reconstruction formula in SPECT with nonuniform absorption fan-beam data are derived by extending Natterer’s results to the AtRT with imaginary coefficients and applying the fan-beam acquisition geometry for the Region of Interest (ROI). The reconstruction result is achieved based on a usual transform between parallel-beam and fan-beam coordinates. |
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| 备注/Memo: | 收稿日期: 2015－04－11. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 国家自然科学基金（61271398）. 第一作者: 沈正洁（1987－）, 女, 湖北咸宁人, 在读硕士研究生, 主要研究方向: 积分变换与图像处理络. E-mail: 742961863@qq.com *通信作者: 王金平（1962－）, 男, 湖北武汉人, 博士/教授, 主要研究方向: 积分变换与图像处理. E-mail: wangjinping@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
