双能量CT的多参数分析及其在肿瘤成像中的应用  

Multi-Parameter Analysis and Clinical Application of Dual-Energy CT

作　　者：石磊[1] 陈新月 李剑[1] 唐永强[1] 杨洪兵 石明国[1] SHI Lei;CHEN Xinyue;LI Jian;TANG Yongqiang;YANG Hongbing;SHI Mingguo(Department of Radiology, Xijing Hospital, The Fourth Military Medical University, Xi’an Shaanxi 710032, China;Siemens Ltd. China, Chengdu Sichuan 610000, China)

机构地区：[1]第四军医大学西京医院放射科,陕西西安710032 [2]西门子(中国)有限公司,四川成都610000

出　　处：《中国医疗设备》2017年第11期18-22,共5页China Medical Devices

基　　金：国家自然科学基金(81000648)

摘　　要：双能CT有多种实现技术,它不仅延续了传统计算机断层CT图像的优点,同时,在不增加放射剂量的同时可以提取更多与诊断相关的频谱信息,利用这些频谱信息可以合成物质选择性图像和能量选择性图像。双能CT能够有效识别和量化在病理过程中出现的异常物质成分信息或是造影剂,如区分结石成分、铁、钙、碘;通过能量选择成像,也能使合成图像的显示和质量更便于临床诊断信息的提取。本文概述实现双能CT的采集技术及其图像种类的在肿瘤成像中的临床应用价值。Dual-energy CT can be implemented in many technologies.It not only has the advantage of CT image of traditional computed tomography,but also can extract more spectrum information related to diagnostics without increasing the radiation dose.The spectral information can be used to synthesize material selective images and energy selective images.Double-energy CT can effectively identify and quantify the information of abnormal substances or contrast agents that occurs during the pathological process,such as the separation of stone components,iron,calcium and iodine.The imaging of energy selection can also make the display and quality of composite images more convenient for the extraction of clinical diagnostic information.In this review,we summarized the technology of dual energy and the image types in clinical application value in tumor imaging.

关 键 词：双能量 造影剂 辐射剂量 双源双探测器 能谱CT 

分 类 号：R814.42[医药卫生—影像医学与核医学]