Next Generation Gamma Detector Arrays for High Resoluti*

提出了现有技术的像素化固态半导体伽马射线成像阵列检测器组件的进步，其中它们在室温检测器中的能量和空间分辨率的优点可以在诸如用于体内成像和核医学的大面积阵列的应用中以最小的成本和风险被利用。固态阵列探测器广泛使用的主要障碍是高质量探测器材料的短缺。该提案的目的是开发技术，通过更容错的探测器和探测器系统设计，增加对现有供应（碲锌镉）的利用。我们计划通过部署一个更小的形状因子探测器阵列来实现这一目标，这允许从给定的晶片中挑选更有用的CZT探测器。将插入器并入检测器组合件中将允许产生检测器阵列的平铺阵列，从而最小化较小形状因子对成像分辨率的影响。通过新的、更灵活的和更少损坏的技术切割CZT晶片也将允许更好地利用现有材料。一个差异化的更清晰的放大器读出阵列的设计将降低对漏电流的敏感性，允许使用比目前的集成读出技术更低电阻率的材料。拟议的商业应用：直接的商业机会是为研究界提供可靠的功能成像阵列检测器组件供应。这些器件可应用于平面成像、SPECT成像系统以及作为手术探针。一些可能的应用是乳房X线摄影、临床心脏病学、体内自动放射摄影、神经科学研究和淋巴系统成像。在小动物体内表达研究中存在巨大的潜力。除了医疗和生物用途外，NASA还需要探测器阵列用于恒星X射线和伽马射线成像系统。

Proposed is advancement of the state-of-the-art pixilated solid state semiconductor gamma ray imaging array detector assemblies to where their advantages of energy and spatial resolution in a room temperature detector may be exploited with minimal cost and risk in applications such as large area arrays for in vivo imaging and nuclear medicine. A major impediment to widespread use of solid state array detectors is the shortage of high quality detector material. The aim of this proposal is to develop techniques for making increased use of the existing supply CdZnTe) through more fault-tolerant detector and detector system designs. We plan to accomplish this by deploying a smaller form factor detector array, that allows culling more useful CZT detectors from a given wafer. The incorporation of an interposer in the detector assembly will allow creation of tiled arrays of detector arrays, minimizing the impact of the smaller form factor on imaging resolution. Cutting of the CZT wafers by new, more flexible and less damaging techniques will also allow better utilization of existing materials. The design of a differentiated sharper amplifier readout array will reduce susceptibility to leakage currents, allowing use of lower resistivity materials than present integrating readout techniques. PROPOSED COMMERCIAL APPLICATIONS: The immediate commercial opportunity is in supplying the research community a reliable supply of functional imaging array detector assemblies. These devices have applications in planar imaging, SPECT imaging systems, and as surgical probes. Some possible applications are mammography, clinical cardiology, in vivo auto radiography, neuroscience studies, and lymphatic system imaging. There exists a huge potential for in vivo expression studies in small animals. Outside of medial and biological uses, detector arrays are needed by NASA for stellar X- and gamma ray imaging systems.