Modelling and correction of charge sharing in cadmium zinc telluride x-ray detectors for photon-counting computed tomography applications

用于光子计数计算机断层扫描应用的碲化镉锌 X 射线探测器中电荷共享的建模和校正

• 批准号: 538569-2019
• 负责人: Tanguay, Jesse
• 金额: $ 1.82万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=680906
• 关键词: Modelling; correction; charge; sharing; cadmium

Canadian-based Redlen Technologies is a leading manufacturer of high-resolution Cadmium Zinc Telluride(CZT) semiconductor radiation detectors. Redlen has developed a CZT-based photon-counting detector modulefor x-ray computed tomography. This detector module enables estimating the shape of x-ray spectra - afunctionality that is fundamentally not possible with existing clinical CT systems. There are two challengeswith Redlen's novel detector modules: charge sharing and pulse pile-up - both lead to a reduction in x-rayimage quality. Dr. Tanguay is an Early-Career Researcher who has developed advanced models that enableunderstanding the imaging performance of x-ray imaging detectors. This Engage project will leverage Redlen'sstate-of-the art technology and Dr. Tanguay's unique expertise to solve Redlen's unique R&D problem, and indoing so will (1) develop new tools for modelling energy-resolving x-ray imaging detectors, (2) create newknowledge on the fundamentals of image formation in x-ray CT and (3) develop advanced algorithms forcorrection of charge sharing in energy-resolved x-ray CT. This research project will advance Canadiancompanies' knowledge of x-ray image science, thus increasing business opportunities and internationalcompetitiveness of the Canadian manufacturing sector, will produce highly qualified personnel with the skillsrequired to meet future industrial needs in the field of radiation detectors for medical imaging and industrialapplications, and will contribute to Canada's position as a technology leader.

总部位于加拿大的 Redlen Technologies 是高分辨率碲化镉锌 (CZT) 半导体辐射探测器的领先制造商。 Redlen 开发了一种用于 X 射线计算机断层扫描的基于 CZT 的光子计数探测器模块。该探测器模块能够估计 X 射线光谱的形状，这是现有临床 CT 系统根本不可能实现的功能。 Redlen 的新型探测器模块面临两个挑战：电荷共享和脉冲堆积 - 两者都会导致 X 射线图像质量下降。 Tanguay 博士是一位早期职业研究员，他开发了先进的模型，可以帮助了解 X 射线成像探测器的成像性能。该 Engage 项目将利用 Redlen 最先进的技术和 Tanguay 博士的独特专业知识来解决 Redlen 独特的研发问题，这样做将 (1) 开发用于建模能量分辨 X 射线成像探测器的新工具，(2 ) 创建有关 X 射线 CT 图像形成基础的新知识，以及 (3) 开发用于校正能量分辨 X 射线 CT 中电荷共享的先进算法。该研究项目将提高加拿大公司在 X 射线图像科学方面的知识，从而增加加拿大制造业的商机和国际竞争力，并将培养高素质人才，他们具备满足医学成像和辐射探测器领域未来工业需求所需的技能。工业应用，并将有助于加拿大作为技术领导者的地位。