Greffier Joël, Viry Anaïs, Robert Antoine, Khorsi Mouad, Si-Mohamed Salim
IMAGINE UR UM 103, Montpellier University, Department of Medical Imaging, Nîmes University Hospital, 30900 Nîmes, France.
Institute of Radiation Physics, Lausanne University Hospital and University of Lausanne, 1007 Lausanne, Switzerland.
Diagn Interv Imaging. 2025 Feb;106(2):53-59. doi: 10.1016/j.diii.2024.09.002. Epub 2024 Sep 20.
In recent years, computed tomography (CT) has undergone a number of developments to improve radiological care. The most recent major innovation has been the development of photon-counting detectors. By comparison with the energy-integrating detectors traditionally used in CT, these detectors offer better dose efficiency, eliminate electronic noise, improve spatial resolution and have intrinsic spectral sensitivity. These detectors also allow the energy of each photon to be counted, thus improving the sampling of the X-ray spectrum in multiple energy bins, to better distinguish between photoelectric and Compton attenuation coefficients, resulting in better spectral images and specific color K-edge images. The purpose of this article was to make the reader more familiar with the basic principles and techniques of new photon-counting CT systems equipped with photon-counting detectors and also to describe the currently available devices that could be used in clinical practice.
近年来，计算机断层扫描（CT）已有多项改进以提升放射诊疗水平。最新的重大创新是光子计数探测器的研发。与CT传统使用的能量积分探测器相比，这些探测器具有更高的剂量效率，可消除电子噪声，提高空间分辨率并具备固有的光谱灵敏度。这些探测器还能对每个光子的能量进行计数，从而改善在多个能量区间对X射线光谱的采样，更好地区分光电子和康普顿衰减系数，生成更好的光谱图像和特定的彩色K边图像。本文旨在让读者更熟悉配备光子计数探测器的新型光子计数CT系统的基本原理和技术，并介绍目前可用于临床实践的设备。
