Miller Brian W, Barrett Harrison H, Furenlid Lars R, Barber H Bradford, Hunter Robert J
Department of Radiology, University of Arizona, Tucson, AZ 85724, USA.
Nucl Instrum Methods Phys Res A. 2008 Jun 11;591(1):272-275. doi: 10.1016/j.nima.2008.03.072.
Recent advances have been made with the BazookaSPECT detector, a high-resolution CCD-based gamma camera which utilizes an MCP-based image intensifier for upfront optical gain. Operating the gamma camera at high frame rates leads to a massive amount of data throughput, thereby inducing the need for real-time processing. We have developed and implemented a list-mode algorithm which allows for real-time data acquisition and processing at high frame rates. This is accomplished with a graphics processing unit (GPU), which provides processing capabilities in addition to the CPU. We have also developed a gamma-ray microscope based on the BazookaSPECT detector and micro-coded apertures. Experimental phantom images show the gamma-ray microscope having an estimated reconstruction resolution of ~30 μm, an unprecedented resolution in gamma-ray imaging.
巴祖卡单光子发射计算机断层扫描（SPECT）探测器取得了最新进展，这是一种基于电荷耦合器件（CCD）的高分辨率伽马相机，它利用基于微通道板（MCP）的图像增强器实现前期光学增益。以高帧率操作伽马相机导致大量的数据吞吐量，从而引发了对实时处理的需求。我们开发并实施了一种列表模式算法，该算法允许以高帧率进行实时数据采集和处理。这是通过图形处理单元（GPU）实现的，它除了提供中央处理器（CPU）的处理能力外，还具备额外的处理能力。我们还基于巴祖卡SPECT探测器和微编码孔径开发了一种伽马射线显微镜。实验体模图像显示，该伽马射线显微镜的估计重建分辨率约为30微米，这在伽马射线成像中是前所未有的分辨率。
