Improving depth resolution of diffuse optical tomography with an exponential adjustment method based on maximum singular value of layered sensitivity
Improving depth resolution of diffuse optical tomography with an exponential adjustment method based on maximum singular value of layered sensitivity
复制标题
基于分层灵敏度最大奇异值的指数调节方法提高漫射光学层析成像深度分辨率
DOI：
10.3788/col20080612.0886
复制
发表时间：
2008-12
期刊：
影响因子：
--
通讯作者：
Niu, Haijing
中科院分区：
文献类型：
--
作者：
Guo, Ping;Jiang, Tianzi;Song, Xiaodong;Niu, Haijing
扩散光学层析成像（DOT）的灵敏度随着光子穿透深度的增加呈指数下降，导致DOT的深度分辨率变差。本文提出了一种基于分层灵敏度最大奇异值的指数平差方法。通过补偿深部介质中降低的灵敏度，可以获得最佳的深度分辨率。仿真结果表明，EAM方法可以显著提高介质中深埋目标的深度分辨率。因此，这些对象的图像质量和重建精度得到了很大的改善。
The sensitivity of diffuse optical tomography (DOT) imaging exponentially decreases with the increase of photon penetration depth, which leads to a poor depth resolution for DOT. In this letter, an exponential adjustment method (EAM) based on maximum singular value of layered sensitivity is proposed. Optimal depth resolution can be achieved by compensating the reduced sensitivity in the deep medium. Simulations are performed using a semi-infinite model and the simulation results show that the EAM method can substantially improve the depth resolution of deeply embedded objects in the medium. Consequently, the image quality and the reconstruction accuracy for these objects have been largely improved.