CDTE DETECTORS FOR SIMULTANEOUS EMISSION/TRANSMISSION CT

用于同步发射/传输 CT 的 CDTE 探测器

• 批准号: 2285201
• 负责人: MICHAEL R. SQUILLANTE
• 金额: $ 8.03万
• 依托单位: RADIATION MONITORING DEVICES, INC.
• 依托单位国家: 美国
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-06-20 至 1995-04-14
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/2285201
• 关键词: X ray; biomedical equipment development; cadmium; computed axial tomography; crystallization; gamma radiation; radiation detector; semiconduction; single photon emission computed tomography; solid state; tellurium

A simultaneous Emission/Transmission Computed Tomography (ETCT) system possesses the advantages of both SPECT and CT by offsetting the individual weakness of each. However, the successful development of ETCT machine must include improved spatial resolution, which currently is limited by the X- ray and gamma-ray detector systems used. Scintillation cameras used in SPECT are essentially at their limit of spatial resolution. Silicon photodiode detectors used in CT are limited by sensitivity. The most promising detectors for this application are solid state detectors like HPGe and CdTe. The cryogenic requirement of HPGe makes CdTe a unique candidate for the ETCT innovation. Our recent process with CdTe x-ray and gamma-ray detectors is very encouraging, an energy resolution of l.7KeV FWHM has been observed for 57Co (l22KeV). Further research into this promising system has high potential of producing a new detector technology with better performance, which could be the basis for a future generation of medical imaging instruments like ETCT. The goal of this Phase I program is to demonstrate the feasibility of using the semiconductor CdTe in ETCT instruments.

同时发射/传输计算机断层扫描（ETCT）系统 通过抵消个人，具有SPECT和CT的优势 每个人的弱点。但是，ETCT机器的成功开发必须 包括改进的空间分辨率，目前受X-的限制 Ray和Gamma射线检测器系统使用。 SPECT中使用的闪烁摄像机本质上是 空间分辨率。 CT中使用的硅光二极管检测器受到限制 灵敏度。该应用程序最有前途的探测器是固体 诸如HPGE和CDTE之类的状态探测器。 HPGE的低温需求 使CDTE成为ETCT创新的独特候选人。 我们最近使用CDTE X射线和伽马射线检测器的过程非常 令人鼓舞的是，已经观察到了L.7KeV FWHM的能量解决方案 57co（L22Kev）。对这个有前途的系统的进一步研究很高 生产具有更好性能的新检测技术的潜力 这可能是将来一代医学成像的基础 像ETCT这样的乐器。 I阶段我计划的目标是证明 在ETCT仪器中使用半导体CDTE的可行性。