| 摘要: |
| 磁共振弥散加权成像(DWI)反映了水分子的微观弥散运动,是从细胞及分子水平来进行疾病研究的新技术;其成像原理及影响因素较复杂.对b值(即弥散敏感因子)、表观弥散系数(ADC)、各向异性、T2穿透效应及伪影等影响因素分别加以阐述,有助于对弥散成像信号的理解. |
| 关键词: 磁共振 弥散加权成像 影响因素 |
| DOI：10.11724/jdmu.2004.02.28 |
| 分类号:R445.2 |
| 基金项目: |
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| Influencing factors of MR diffusion-weighted signal |
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KANG Jian-yun, WU Jian-lin
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Department of Radiology,the First Clinical College of Dalian Medical University ,Dalian 116011,China
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| Abstract: |
| MR diffusion-weighted imaging(DWI) reflects the microscopic Brownian motion of water molecules. It is a new technology for disease research from the cellular and molecular level. And the imaging principles and influencing factors are complex. The authors discussed the influencing factors such as bvalues , apparent diffusion coefficient (ADC),anisotropy,T2 shine-through effect and artifacts, which is helpful for understanding of DWI signal |
| Key words: MR Diffusion-weighted imaging influence factors |