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西北大学 信息科学与技术学院, 陕西 西安 710127
[ "侯榆青(1963-), 女, 陕西榆林人, 教授, 博士生导师, 1984年于西北大学获得学士学位, 1990年于中国科学院西安光机所获得硕士学位, 主要从事数字图像处理、医疗大数据相关影像组学研究。E-mail:houyuqin@nwu.edu.cn" ]
[ "贺小伟(1977-), 男, 陕西米脂人, 教授, 博士生导师, 2005年于西安交通大学获得硕士学位, 2011年于西安电子科技大学获得博士学位, 主要从事光学分子影像、医学图像处理及可视化、颅面形态学等方面的研究。E-malil:hexw@nwu.edu.cn" ]
收稿日期:2018-01-14,
录用日期:2018-3-2,
纸质出版日期:2018-10-25
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侯榆青, 张文元, 王晓东, 等. 结合流形正则和变量分离近似稀疏重构的荧光分子断层成像[J]. 光学 精密工程, 2018,26(10):2592-2604.
Yu-qing HOU, Wen-yuan ZHANG, Xiao-dong WANG, et al. Light source reconstruction method in fluorescence molecular tomography based on Laplacian manifold regularization and sparse reconstruction by separable approximation[J]. Optics and precision engineering, 2018, 26(10): 2592-2604.
侯榆青, 张文元, 王晓东, 等. 结合流形正则和变量分离近似稀疏重构的荧光分子断层成像[J]. 光学 精密工程, 2018,26(10):2592-2604. DOI: 10.3788/OPE.20182610.2592.
Yu-qing HOU, Wen-yuan ZHANG, Xiao-dong WANG, et al. Light source reconstruction method in fluorescence molecular tomography based on Laplacian manifold regularization and sparse reconstruction by separable approximation[J]. Optics and precision engineering, 2018, 26(10): 2592-2604. DOI: 10.3788/OPE.20182610.2592.
为改善荧光分子断层成像的重建结果,本文采用联合稀疏-流形正则模型进行光源重建,该联合稀疏-流形正则模型能同时利用重建光源聚集性和稀疏性的先验信息。为有效求解该联合稀疏-流形正则模型,本文通过重新推导变量分离近似稀疏重构算法对其进行求解。为加快变量分离近似稀疏重构算法求解联合稀疏-流形正则模型的速度,本文在光源重建过程中采用了热启动策略。实验结果表明,相比变量分离近似稀疏重构算法求解范数模型,变量分离近似稀疏重构算法求解联合稀疏-流形正则模型将重建结果的对比噪声比从6.45提升至9.18。另外,相比没有采用热启动策略,采用热启动策略的变量分离近似稀疏重构算法求解联合稀疏-流形正则模型的时间从101.84 s减至50.10 s。本文方法显著提高了光源目标重建的精度和速度,取得了更优的重建结果。
To enhance reconstruction performance in fluorescence molecular tomography
a joint-norm and a Laplacian manifold regularization model that combined both sparsity and spatial aggregation information was utilized for light source reconstruction. In this report
sparse reconstruction by separable approximation (SpaRSA) was developed to investigate the joint model (SpaRSA-resolved Laplacian manifold regularization model
SpaRSALM). To improve the convergence speed of the SpaRSALM algorithm
a warm-start strategy was applied for light source reconstruction. The experimental results show that the SpaRSALM algorithm solved the joint model problem and improved the contrast to noise ratio (CNR) from 6.45 to 9.18 compared to using the SpaRSA algorithm to solve for the -norm regularization model. In addition
the reconstruction of the SpaRSALM algorithm using the warm-start strategy (compared to without the warm-start strategy) required 50.10 s (as opposed to 101.84 s). The accuracy and speed of light source reconstruction were significantly improved
and better reconstruction results were achieved using the presented method.
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侯榆青, 贾涛, 易黄健, 等.基于改进谱投影梯度算法的X射线发光断层成像[J].光学 精密工程, 2017, 25(1):42-49.
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