Evaluation of a compact, general-purpose Germanium Gamma Camera
Evaluation of a compact, general-purpose Germanium Gamma Camera
复制标题
紧凑型通用锗伽玛相机的评估
DOI：
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
T. Peterson
中科院分区：
文献类型：
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作者：
D. Campbell;E. Hull;T. Peterson
高纯锗（HPGe）探测器的技术进步已经产生了紧凑的，机械冷却的伽马相机，不需要庞大的液氮杜瓦瓶操作。当在双面条带配置中使用时，可以使用用于位置插值的脉冲信号分析来获得比条带宽度更精细的空间分辨率。HPGe探测器具有3D位置灵敏度和出色的能量分辨率（140 keV时1%FWHM），在生物医学成像中有许多可能的应用。在这里，我们介绍了锗伽马相机（GGC1.1），一个完全集成的成像系统，包括一个90毫米直径，10毫米厚的锗探测器与16 × 16正交条5毫米间距有0.25毫米宽的带之间的间隙。所有数据采集、系统控制和系统监控功能都可通过单个USB-2.0端口访问。集成组件还允许平行孔和针孔准直器的可互换安装。GGC1.1探测器系统的固有特性根据伽马相机的NEMA NU 1-2007标准进行测量，包括探测器效率、空间分辨率、能量分辨率和均匀性。此外，我们证明了平面成像能力的GGC1.1与平行孔和针孔准直器扫描线源，以及一个幻影组成的球形热点在温暖的背景。
Technological advances in High-Purity Germanium (HPGe) detectors have given rise to compact, mechanically cooled gamma cameras that do not require bulky liquid nitrogen dewars to operate. When used in the double-sided strip configuration, spatial resolution finer than the strip width can be obtained using pulse signal analysis for position interpolation. With 3D position sensitivity and excellent energy resolution (1% FWHM at 140 keV), HPGe detectors have many possible applications in biomedical imaging. Here, we introduce the Germanium Gamma Camera (GGC1.1), a fully integrated imaging system incorporating a 90-mm diameter, 10-mm thick germanium detector with 16 × 16 orthogonal strips of 5-mm pitch having 0.25-mm wide gaps between the strips. All data acquisition, system control, and system monitoring functions are accessed through a single USB-2.0 port. An integrated assembly also allows for interchangeable mounting of parallel-hole and pinhole collimators. The intrinsic properties of the GGC1.1 detector system are measured according to the NEMA NU 1-2007 standards for gamma cameras, including detector efficiency, spatial resolution, energy resolution, and uniformity. In addition, we demonstrate the planar imaging capabilities of the GGC1.1 with the parallel-hole and pinhole collimators by scanning line sources, as well as a phantom comprised of spherical hot spots in a warm background.
数字放射线摄影中基本成像特性的研究。
影响因子：
3.8
作者：
Giger,ML;Doi,K;Fujita,H
通讯作者：
Fujita,H