确定正电子发射断层扫描仪的块探测器位置
Determining Block Detector Positions for PET Scanners.
作者信息
Pierce Larry, Miyaoka Robert, Lewellen Tom, Alessio Adam, Kinahan Paul
机构信息
University of Washington, Seattle, WA. 98195.
出版信息
IEEE Nucl Sci Symp Conf Rec (1997). 2009 Oct 24;2009:2976-2980. doi: 10.1109/NSSMIC.2009.5401595.
We present an algorithm for accurate localization of block detectors in a positron emission tomography (PET) scanner. Accurate reconstruction of PET images requires precise knowledge of the physical position and orientation of the detectors. However, in some systems, block detector positioning and orientation can have relatively large tolerances, leading to implicit errors in the coincidence line-of-response (LOR) positioning. To compensate we utilize a rotating point source phantom where the rotational angle of the phantom is used to precisely determine the location of each scintillator crystal within a detector block. The aggregate block positions are then applied to the system model to determine the true location of each LOR. Images reconstructed with the more accurate LOR positioning demonstrate improved image fidelity.
我们提出了一种用于在正电子发射断层扫描（PET）扫描仪中精确定位块探测器的算法。PET图像的精确重建需要精确了解探测器的物理位置和方向。然而，在某些系统中，块探测器的定位和方向可能存在相对较大的容差，从而导致符合响应线（LOR）定位中出现隐含误差。为了进行补偿，我们使用了一个旋转点源体模，其中体模的旋转角度用于精确确定探测器块内每个闪烁晶体的位置。然后将汇总的块位置应用于系统模型，以确定每个LOR的真实位置。使用更精确的LOR定位重建的图像显示出更高的图像保真度。
Zotero 插件