光谱CT在检测骨骼肌肉系统疾病中的临床应用  

Clinical application of spectral CT in musculoskeletal system diseases

作　　者：吕登 望云 刘士远 LYU Deng;WANG Yun;LIU Shiyuan(Department of Radiology,Second Affiliated Hospital of Navy Medical University,Shanghai 200003,China)

机构地区：[1]海军军医大学第二附属医院放射诊断科,上海200003

出　　处：《医学影像学杂志》2023年第3期509-512,共4页Journal of Medical Imaging

基　　金：国家自然科学基金项目(编号:81930044)。

摘　　要：基于探测器水平的光谱CT是一种新型双能CT,它采用双层探测器技术同时收集患者使用CT标准方案获得的所有低能量和高能量数据,一次扫描不仅能得到常规CT图像,还可生成反映康普顿效应和光电效应不同组成的光谱图像,包括范围40~200 keV的虚拟单能量图像、无水碘图、碘密度图、有效原子序数图,虚拟平扫图、尿酸对比图等,可获得3~4倍于常规CT扫描得到的信息,这些信息对骨骼肌肉系统疾病的检出、诊断及预后评估提供了重要的参考价值。本文主要介绍光谱CT在对金属伪影去除,软骨和椎间盘分析,骨密度测量以及痛风、骨髓水肿、多发性骨髓瘤、转移瘤等相关疾病检出方面的潜力。Detector-based spectral CT is a new dual-energy CT,which uses the double-layer detector technology to collect all the low-energy and high-energy data obtained by patients using the standard CT protocol.In one scan,not only conventional CT images can be obtained,but also spectral images reflecting the different components of compton effect and photoelectric effect can be generated,including virtual monoenergetic images ranging from 40 keV to 200 keV,iodine no water map,iodine density map,effective atomic number map,virtual non-contrast image,uric acid contrast map and so on,obtaining 3~4 times more information than conventional CT scan,which can provide important reference value for the detection,diagnosis and prognosis evaluation of musculoskeletal system diseases.This article mainly introduces the potential of spectral CT in metal artifact removal,cartilage and disc analysis,bone mineral density measurement and the detection of gout,bone marrow edema,multiple myeloma,metastasis and other related diseases.

关 键 词：体层摄影术 X线计算机 双层探测器光谱CT 骨骼肌肉系统 

分 类 号：R814.42[医药卫生—影像医学与核医学] R68[医药卫生—放射医学]