Van Holen Roel, Moore Jared W, Clarkson Eric W, Furenlid Lars R, Barrett Harrison H
MEDISIP, Department of Electronics and Information Systems, Ghent University, B-9000 Ghent, Belgium. Department of Radiology, University of Arizona, Tucson, AZ 85724 USA.
College of Optical Sciences, University of Arizona, Tucson, AZ 85721 USA.
IEEE Nucl Sci Symp Conf Rec (1997). 2010;2010:2539-2544. doi: 10.1109/NSSMIC.2010.5874245. Epub 2010 Oct 30.
In order to obtain optimal image quality with respect to a particular task, adaptive imaging systems automatically change their acquisition parameters in response to preliminary data being recorded from the object under study. Currently, the adaptive aspect in Single Photon Emission Computed Tomography (SPECT) is limited to a manual collimator interchange and the choice of detector rotation radius. Furthermore, there is often no optimization of any kind with respect to a certain task. There is thus a need for more versatile SPECT systems that autonomously optimize their acquisition geometry for every task and every patient. Here we describe a pinhole SPECT imager, AdaptiSPECT, which is being developed at the Center for Gamma Ray Imaging (CGRI) to enable adaptive SPECT imaging in a pre-clinical context. Furthermore, ideas for an autonomous adaptation procedure are discussed and some preliminary results are reported upon.
为了针对特定任务获得最佳图像质量，自适应成像系统会根据从被研究对象记录的初步数据自动更改其采集参数。目前，单光子发射计算机断层扫描（SPECT）中的自适应方面仅限于手动更换准直器和选择探测器旋转半径。此外，对于特定任务通常没有进行任何类型的优化。因此，需要更通用的SPECT系统，能够针对每个任务和每个患者自主优化其采集几何结构。在此，我们描述一种针孔SPECT成像仪AdaptiSPECT，它由伽马射线成像中心（CGRI）开发，用于在临床前环境中实现自适应SPECT成像。此外，还讨论了自主适应程序的想法，并报告了一些初步结果。
