光子计数 CT：技术原理与临床前景。

Photon-counting CT: Technical Principles and Clinical Prospects.

机构信息

From the Department of Radiology (M.J.W., M.P., N.J.P., D.F.) and Stanford Cardiovascular Institute (D.F.), Stanford University School of Medicine, 300 Pasteur Dr, S-072, Stanford, CA 94305-5105; Department of Radiology, University Medical Center Utrecht, Utrecht, the Netherlands (M.J.W.); Departments of Bioengineering (M.P., N.J.P.) and Electrical Engineering (N.J.P.), Stanford University, Stanford, Calif; Department of Radiology and Department of Imaging Sciences and Biomedical Informatics, Emory University School of Medicine, Atlanta, Ga (A.P.).

出版信息

Radiology. 2018 Nov;289(2):293-312. doi: 10.1148/radiol.2018172656. Epub 2018 Sep 4.

DOI:10.1148/radiol.2018172656

PMID:30179101

Abstract

Photon-counting CT is an emerging technology with the potential to dramatically change clinical CT. Photon-counting CT uses new energy-resolving x-ray detectors, with mechanisms that differ substantially from those of conventional energy-integrating detectors. Photon-counting CT detectors count the number of incoming photons and measure photon energy. This technique results in higher contrast-to-noise ratio, improved spatial resolution, and optimized spectral imaging. Photon-counting CT can reduce radiation exposure, reconstruct images at a higher resolution, correct beam-hardening artifacts, optimize the use of contrast agents, and create opportunities for quantitative imaging relative to current CT technology. In this review, the authors will explain the technical principles of photon-counting CT in nonmathematical terms for radiologists and clinicians. Following a general overview of the current status of photon-counting CT, they will explain potential clinical applications of this technology.

摘要

光子计数 CT 是一种新兴技术，有潜力彻底改变临床 CT。光子计数 CT 使用新的能量分辨 X 射线探测器，其机制与传统的能量积分探测器有很大的不同。光子计数 CT 探测器对入射光子的数量进行计数并测量光子能量。该技术可实现更高的对比噪声比、改善空间分辨率和优化光谱成像。光子计数 CT 可减少辐射暴露，以更高的分辨率重建图像，校正射束硬化伪影，优化对比剂的使用，并为相对当前 CT 技术的定量成像创造机会。在这篇综述中，作者将用非数学术语为放射科医生和临床医生解释光子计数 CT 的技术原理。在对光子计数 CT 的现状进行概述后，他们将解释该技术的潜在临床应用。