Susceptibility-weighted imaging: current status and future directions.
Susceptibility-weighted imaging: current status and future directions.
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DOI：
10.1002/nbm.3552
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发表时间：
2017-04
影响因子：
2.9
通讯作者：
Haacke, E. Mark
中科院分区：
文献类型：
--
作者：
Liu, Saifeng;Buch, Sagar;Chen, Yongsheng;Choi, Hyun-Seok;Dai, Yongming;Habib, Charbel;Hub, Jiani;Jung, Joon-Yong;Luo, Yu;Utriainen, David;Wang, Meiyun;Wu, Dongmei;Xia, Shuang;Haacke, E. Mark
关键词：
磁化率加权成像(SWI)是一种利用局部磁场的固有性质来增强图像对比度的方法，以提高各种磁感源的可见度，便于诊断解释。它也是利用相位进行定量磁化率图(QSM)概念的先驱。如今，SWI已成为一种广泛使用的临床工具，用于成像静脉中的脱氧血红蛋白、脑中的铁沉积、出血、微出血和钙化。在本文中，我们回顾了SWI的基础知识，包括数据采集、数据重建和后处理。重点研究了相位图像中尖点伪影的来源，提出了一种改进的多通道相位数据合成算法。此外，我们还介绍了SWI在成像中风、创伤性脑损伤、颈动脉血管壁、肝硬变铁质结节、前列腺癌、前列腺钙化、脊髓损伤和椎间盘退变中的临床应用。随着SWI在脑内外的临床应用不断扩大，结合QSM改善SWI是该技术未来的重要发展方向。
Susceptibility weighted imaging (SWI) is a method that uses the intrinsic nature of local magnetic fields to enhance image contrast in order to improve the visibility of various susceptibility sources and to facilitate the diagnostic interpretation. It is also the precursor to the concept of using phase for quantitative susceptibility mapping (QSM). Nowadays, SWI has become a widely used clinical tool to image deoxyhemoglobin in veins, iron deposition in the brain, hemorrhages, microbleeds, and calcification. In this paper, we review the basics of SWI, including data acquisition, data reconstruction and post-processing. In particular, the source of cusp artifacts in phase images is investigated in detail and an improved multi-channel phase data combination algorithm is provided. In addition, we show a few clinical applications of SWI for imaging stroke, traumatic brain injury, carotid vessel wall, siderotic nodules in cirrhotic liver, prostate cancer, prostatic calcification, spinal cord injury and intervertebral disc degeneration. As the clinical applications of SWI continue to expand both in and outside the brain, improving SWI in conjunction with QSM is an important future direction of this technology.
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