DIGITAL CZT X FOR GAMMA RAY IMAGING DETECTOR

用于10至150 keV能量范围内的光子的成像探测器具有： 在医疗技术中的许多用途，包括肿瘤成像、SPECT，以及 放射线照相术。 数字输出特别有用，因为它允许 图像增强、分析、传输和存储。 做法是 提出开发一种新技术，使用CdZnTe探测器 材料，这将允许图像获得100 u的空间 分辨率和能量分辨率为2%或更高。这种能力将 促进全新的医疗诊断程序。为 例如，“双能量”血管造影现在可以使用 多色X射线源。 目前的努力将证明概念的可行性， 接近并创造了技术基础， 可以构建应用特定的仪器。 探测器将 模型，使用蒙特卡罗和电子输运，以预测其 信号输出。这些输出将与测量信号进行比较， 验证模型。这些模型将用于开发信号 处理算法，其实现期望的能量和空间 决议。 最后，电子设备将被设计为实现 算法 在第二阶段，将建立一个工作模型， 测试. 建议的商业应用 作为空间分辨率为100 μ的能量分辨数字探测器， 所提出的检测器技术可以找到许多医学应用， 包括SPECT、用于小型哺乳动物的能量分辨血管造影术、骨 啮齿类动物骨骼的密度测量，以及小型手持伽马照相机。 非 医学应用将包括非破坏性测试， 天体物理伽马成像，核清理用途，以及科学 仪器.

Imaging detectors for photons in the 10 to 150 keV energy range have many uses in medical technology including tumor imaging, SPECT, and radiography. Digital output is particularly useful since it allows image enhancement, analysis, transmission and storage. An approach is proposed for developing a new technology, using CdZnTe detector material, which would allow images to be obtained with 100 u spatial resolution and energy resolution of 2% or better. This capability would facilitate entirely new classes of medical diagnostic procedures. For example, "dual energy" angiography could now be done using a polychromatic x-ray source. The present effort will demonstrate the feasibility of the conceptual approach and create the technological foundation upon which later, application specific instruments can be built. Detectors will be modeled, using Monte Carlo and electron transport, to predict their signal outputs. These outputs will be compared to measured signals to validate the models. The models will then be employed to develop signal processing algorithms which achieve the desired energy and spatial resolutions. Finally, electronics will be designed to implement the algorithms. In Phase II a working model would be constructed and tested. PROPOSED COMMERCIAL APPLICATION As an energy resolved digital detector with 100 u spatial resolution, the proposed detector technology could find many medical applications, including SPECT, energy resolved angiography for small mammals, bone densitometry on rodent bones, and small, hand-held gamma cameras. Non- medical applications would include non-destructive testing, astrophysical gamma imaging, nuclear cleanup uses, and scientific instruments.