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

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开发了一种基于cts的光子计数检测器模块，用于x射线计算机断层扫描。这个检测器模块可以估计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的新型探测器模块有两个挑战：电荷共享和脉冲堆积——两者都会导致x射线图像质量的降低。Tanguay博士是一名早期职业研究员，他开发了先进的模型，使人们能够理解x射线成像探测器的成像性能。这个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)在x射线CT成像基础上创造新知识，(3)开发用于校正能量分辨x射线CT电荷共享的先进算法。该研究项目将推进加拿大公司在x射线图像科学方面的知识，从而增加加拿大制造业的商业机会和国际竞争力，将培养具有满足未来医疗成像和工业应用辐射探测器领域工业需求所需技能的高素质人才，并将有助于加拿大作为技术领导者的地位。

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.