Development of Low-Cost CZT for Nuclear Imaging.

用于核成像的低成本 CZT 的开发。

• 批准号: 6404229
• 负责人: Longxia Li
• 金额: $ 13.38万
• 依托单位: YINNEL TECH, INC.
• 依托单位国家: 美国
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-01 至 2002-01-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6404229
• 关键词: X ray spectrometry; bioengineering /biomedical engineering; bioimaging /biomedical imaging; crystallization; gamma radiation; nuclear medicine; scintillation cameras; technology /technique development; zinc

DESCRIPTION (Provided by Applicant): Development of Low-Cost CZT grown by Modified Vertical Bridgman Technique is proposed for use in making hybrid arrays for high-resolution X-and gamma-ray imaging cameras, and making for diagnosis of heart disease, detection of tumors, genetics, bone scans, fluoroscopy, and cognitive neuroscience. Preliminary results are shown to exhibit excellent crystalline quality, high electron resistively and mobility-lifetime products for both electrons and holes have been obtained and selected at random from ingots at SNL (l-4). Pixilated arrays fabricated at Technion (5) exhibit excellent spectral performance. High-resolution photo peaks are observed without any pulse processing or compensation techniques. Spectrometers, operated at 400V, and realized on 20x20x5mm3 substrate, exhibit 3 percent resolution for l22keV photons with excellent peak-to valley ratio, excellent counting efficiency and low leakage current. We propose to future study, optimize and develop CZT growth technique. We believe that this development will provide larger size wafers (40x40x5 mm3) and higher yield of CZT single crystals with lower cost, and will represent a significant advance towards the economic feasibility of high-resolution room-temperature gamma cameras for nuclear medicine. PROPOSED COMMERCIAL APPLICATION: The proposed large-size CZT crystals produced by the MVB technique are needed for production of room-temperature high-resolution solid-state imaging cameras. The proposed technique is expected to provide better energy resolution and a low-cost alternative to the current growth technique, and if successful, it will enable a broad range of medical applications. This development will also open new opportunities for use of the technology for environmental monitoring, baggage scanning and national security applications.

描述（由申请人提供）：通过以下方法生长的低成本CZT的开发： 本文提出了一种改进的垂直布里奇曼技术， 用于高分辨率X射线和伽马射线成像相机的阵列， 心脏病的诊断，肿瘤的检测，遗传学，骨骼扫描， 荧光透视和认知神经科学。初步结果显示， 显示出优异的结晶质量、高电子发射率， 已经获得了电子和空穴的迁移率-寿命乘积， 从SNL（1 -4）的锭中随机选择。制造的像素阵列 Technion（5）具有优异的光谱性能。高分辨率照片 在没有任何脉冲处理或补偿技术的情况下观察到峰值。 光谱仪，在400 V下操作，并实现在20 × 20 × 5 mm 3基板上， 对于122 keV光子，分辨率为3%，具有出色的峰谷比， 具有良好的计数效率和低漏电流。我们建议未来 研究、优化和发展CZT生长技术。我们认为这 开发将提供更大尺寸的晶片（40 × 40 × 5 mm 3）和更高的产量， CZT单晶具有更低的成本，并将代表一个重大的进展 高分辨率室温伽马射线的经济可行性 用于核医学的摄像机 拟定商业应用： 所提出的通过MVB技术生产的大尺寸CZT晶体需要用于 生产室温高分辨率固态成像相机。 的 所提出的技术预计将提供更好的能量分辨率和低成本 替代目前的增长技术，如果成功，它将使广泛的 医疗应用的范围。 这一发展也将开启新的机遇 用于环境监测、行李扫描和国家 安全应用。