Department of Diagnostic and Interventional Radiology, University Hospital Tübingen, Tübingen, Germany.
Department of Diagnostic and Interventional Radiology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
Rofo. 2024 Jan;196(1):25-35. doi: 10.1055/a-2119-5802. Epub 2023 Oct 4.
Photon-counting detector computed tomography (PCD-CT) is a promising new technology with the potential to fundamentally change workflows in the daily routine and provide new quantitative imaging information to improve clinical decision-making and patient management.
The contents of this review are based on an unrestricted literature search of PubMed and Google Scholar using the search terms "photon-counting CT", "photon-counting detector", "spectral CT", "computed tomography" as well as on the authors' own experience.
The fundamental difference with respect to the currently established energy-integrating CT detectors is that PCD-CT allows for the counting of every single photon at the detector level. Based on the identified literature, PCD-CT phantom measurements and initial clinical studies have demonstrated that the new technology allows for improved spatial resolution, reduced image noise, and new possibilities for advanced quantitative image postprocessing.
For clinical practice, the potential benefits include fewer beam hardening artifacts, a radiation dose reduction, and the use of new or combinations of contrast agents. In particular, critical patient groups such as oncological, cardiovascular, lung, and head & neck as well as pediatric patient collectives benefit from the clinical advantages.
· Photon-counting computed tomography (PCD-CT) is being used for the first time in routine clinical practice, enabling a significant dose reduction in critical patient populations such as oncology, cardiology, and pediatrics.. · Compared to conventional CT, PCD-CT enables a reduction in electronic image noise.. · Due to the spectral data sets, PCD-CT enables fully comprehensive post-processing applications..
· Hagen F, Soschynski M, Weis M et al. Photon-counting computed tomography - clinical application in oncological, cardiovascular, and pediatric radiology. Fortschr Röntgenstr 2024; 196: 25 - 34.
光子计数探测器 CT（PCD-CT）是一种很有前途的新技术，有可能从根本上改变日常工作流程，并提供新的定量成像信息，以改善临床决策和患者管理。
本综述的内容基于对 PubMed 和 Google Scholar 进行的无限制文献检索，使用的检索词为“photon-counting CT”“photon-counting detector”“spectral CT”“computed tomography”以及作者自己的经验。
与目前已建立的能量积分 CT 探测器相比，PCD-CT 的根本区别在于它允许在探测器级别上对每个光子进行计数。基于已确定的文献，PCD-CT 体模测量和初步临床研究表明，这项新技术允许提高空间分辨率、降低图像噪声以及为高级定量图像后处理提供新的可能性。
对于临床实践，潜在的好处包括更少的束硬化伪影、减少辐射剂量以及使用新的或组合的造影剂。特别是，肿瘤学、心血管、肺部和头颈部以及儿科等关键患者群体将从临床优势中受益。
· 光子计数计算机断层扫描（PCD-CT）首次在常规临床实践中使用，使肿瘤学、心脏病学和儿科等关键患者群体的剂量显著降低。· 与常规 CT 相比，PCD-CT 可以降低电子图像噪声。· 由于光谱数据集，PCD-CT 可以实现全面的后处理应用。
· Hagen F, Soschynski M, Weis M 等。光子计数计算机断层扫描——在肿瘤学、心血管和儿科放射学中的临床应用。Fortschr Röntgenstr 2024; 196: 25-34.
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