Department of Radiology, Utah Center for Advanced Imaging, University of Utah, Salt Lake City, Utah 84108, USA.
Med Phys. 2010 Sep;37(9):4627-33. doi: 10.1118/1.3471376.
The aim of this article is to propose an exact SPECT region of interest (ROI) reconstruction method using truncated transmission and truncated emission data.
Recently, the authors published two articles in Physics in Medicine and Biology with two results in SPECT ROI emission image reconstruction. The first result states that if the transmission data are truncated but the emission data are not truncated, the emission image can be exactly reconstructed, provided the entire emission image is inside the region where the transmission data are not truncated. The second result states that if the transmission data are not truncated, the emission ROI can be exactly reconstructed with truncated emission data. This article combines these two results and obtains a new result that the emission ROI can be exactly reconstructed if both transmission and emission data are truncated.
Computer simulations are performed to verify the proposed ROI image reconstruction algorithm.
Exact SPECT ROI image reconstruction is possible using truncated transmission and emission projections with some prior information about the attenuator and the emission distribution.
本文旨在提出一种使用截断的透射和发射数据的精确单光子发射计算机断层扫描（SPECT）感兴趣区（ROI）重建方法。
最近，作者在《物理医学与生物学》杂志上发表了两篇文章，其中有两个 SPECT ROI 发射图像重建的结果。第一个结果表明，如果仅截断透射数据而不截断发射数据，则只要发射数据完全在未截断的透射数据区域内，就可以准确重建发射图像。第二个结果表明，如果未截断透射数据，则可以使用截断的发射数据准确重建发射 ROI。本文将这两个结果结合起来，得出了一个新的结果，即如果同时截断透射和发射数据，则可以准确重建发射 ROI。
进行了计算机模拟以验证所提出的 ROI 图像重建算法。
使用具有衰减器和发射分布的先验信息的截断透射和发射投影，可以实现精确的 SPECT ROI 图像重建。
