Chaix Cécile, Moore Jared W, Van Holen Roel, Barrett Harrison H, Furenlid Lars R
College of Optical Sciences, University of Arizona.
Department of Electronics and Information Systems, Ghent University, Belgium.
IEEE Nucl Sci Symp Conf Rec (1997). 2012 Oct-Nov;2012:3564-3567. doi: 10.1109/NSSMIC.2012.6551816.
In this paper, we present the imaging aperture of an adaptive SPECT imaging system being developed at the Center for Gamma Ray Imaging (AdaptiSPECT). AdaptiSPECT is designed to automatically change its configuration in response to preliminary data, in order to improve image quality for a particular task. In a traditional pinhole SPECT imaging system, the characteristics (magnification, resolution, field of view) are set by the geometry of the system, and any modification can be accomplished only by manually changing the collimator and the distance of the detector to the center of the field of view. Optimization of the imaging system for a specific task on a specific individual is therefore difficult. In an adaptive SPECT imaging system, on the other hand, the configuration can be conveniently changed under computer control. A key component of an adaptive SPECT system is its aperture. In this paper, we present the design, specifications, and fabrication of the adaptive pinhole aperture that will be used for AdaptiSPECT, as well as the controls that enable autonomous adaptation.
在本文中，我们介绍了伽马射线成像中心（AdaptiSPECT）正在研发的自适应单光子发射计算机断层扫描（SPECT）成像系统的成像孔径。AdaptiSPECT旨在根据初步数据自动改变其配置，以提高特定任务的图像质量。在传统的针孔SPECT成像系统中，其特性（放大倍数、分辨率、视野）由系统的几何结构设定，任何修改都只能通过手动更换准直器以及探测器到视野中心的距离来实现。因此，针对特定个体的特定任务对成像系统进行优化很困难。另一方面，在自适应SPECT成像系统中，配置可以在计算机控制下方便地改变。自适应SPECT系统的一个关键部件是其孔径。在本文中，我们介绍了将用于AdaptiSPECT的自适应针孔孔径的设计、规格和制造，以及实现自主适应的控制方法。
