Dept. of Radiol., Pennsylvania Univ., Philadelphia, PA.
IEEE Trans Med Imaging. 1991;10(3):234-9. doi: 10.1109/42.97570.
The authors propose a new 2-D point source scattering deconvolution method. The cross-plane scattering is incorporated into the algorithm by modeling a scattering point source function. In the model, the scattering dependence on axial and transaxial directions is reflected in the exponential fitting parameters, and these parameters are directly estimated from a limited number of measured point response functions. The results comparing the standard in-plane line source deconvolution to the cross-plane point source deconvolution show that for a small source the former technique overestimates the scatter fraction in the plane of the source and underestimates the scatter fraction in adjacent planes. In addition, the authors also propose a simple approximation technique for deconvolution.
作者提出了一种新的二维点源散射反卷积方法。通过对散射点源函数建模，将平面外散射纳入算法中。在该模型中，散射对轴向和横向方向的依赖性反映在指数拟合参数中，这些参数可以直接从有限数量的测量点响应函数中估计得到。将标准的平面线源反卷积与平面外点源反卷积进行比较的结果表明，对于小源，前者技术高估了源平面内的散射分数，低估了相邻平面内的散射分数。此外，作者还提出了一种简单的反卷积近似技术。
