Novel Photon Counting Clinical CT Detectors

描述（由申请人提供）：具有能量分束的光子计数探测器可以通过对检测到的每个x射线进行计数和分束来提高CT的性能。应用于乳房x线照相术和x线照相术的光子计数x射线探测器显示，在保持足够对比度的情况下，剂量减少了40%至400%。对于CT的使用，这些检测器是有限的，因为它们的最大计数率有上限，并且需要在最大计数率能力方面取得进展。为了克服计数率的限制，在减小专用集成电路（asic）尺寸方面的新技术发展已被应用于读出半导体探测器。这些进步，以及化合物半导体碲化镉（CdTe）成本和可靠性的提高，使我们能够开发用于CT的光子计数检测器和读出技术。因此，快速通道I/ II阶段提案的总体目标是开发具有能量分组和读出的光子计数CT检测器，能够产生能量分辨CT扫描，可以提供更少的辐射剂量并区分组织类型。

DESCRIPTION (provided by applicant): Photon counting detectors with energy binning can improve CT performance by counting and binning each x-ray detected. Photon counting x-ray detectors applied to mammography and radiography have shown a dose reduction of 40% to 400% while maintaining sufficient contrast for these applications. For use in CT these detectors are limited, due to an upper bound in terms of their maximum count rate, and advances in maximum count rate capabilities is needed. In order to overcome count rate limitations, new technological developments in reducing the size of application specific integrated circuits (ASICs) has been applied to reading out semiconductor detectors. These advancements, along with improvements to the cost and reliability of the compound semiconductor cadmium telluride (CdTe), allow us to develop a photon counting detector and read-out technology for CT. Therefore the overall goal of this Fast Track Phase I/Phase II proposal is to develop a photon counting CT detector with energy binning and read-out that is capable of producing energy resolved CT scan which can deliver less radiation dose and differentiate between tissue types.