Departments of Radiology and Medical Physics, University of Wisconsin School of Medicine and Public Health, 600 Highland Ave, Madison, WI, 53792, USA.
Department of Radiology, University of Washington, Seattle, WA, USA.
Abdom Radiol (NY). 2024 Sep;49(9):3251-3260. doi: 10.1007/s00261-024-04357-x. Epub 2024 May 15.
Photon counting detector CT (PCD-CT) is the newest major development in CT technology and has been commercially available since 2021. It offers major technological advantages over current standard-of-care energy integrating detector CT (EID-CT) including improved spatial resolution, improved iodine contrast to noise ratio, multi-energy imaging, and reduced noise. This article serves as a foundational basis to the technical approaches and concepts of PCD-CT technology with primary emphasis on detector technology in direct comparison to EID-CT. The article also addresses current technological challenges to PCD-CT with particular attention to cross talk and its causes (e.g., Compton scattering, fluorescence, charge sharing, K-escape) as well as pile-up.
光子计数探测器 CT（PCD-CT）是 CT 技术的最新重大进展，自 2021 年以来已商业化。与当前的标准护理能量积分探测器 CT（EID-CT）相比，它具有重大的技术优势，包括提高空间分辨率、提高碘对比噪声比、多能量成像和降低噪声。本文为 PCD-CT 技术的技术方法和概念提供了基础，主要侧重于与 EID-CT 的直接比较的探测器技术。本文还讨论了 PCD-CT 的当前技术挑战，特别关注串扰及其原因（例如康普顿散射、荧光、电荷共享、K 逃逸）以及堆积。
