| 弥散加权成像在肝脏局灶性病变中的应用 |
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| 引用本文： | 程华才,陈家祥,马岩,潘豫节,张宏伟.弥散加权成像在肝脏局灶性病变中的应用[J].中国CT和MRI杂志,2011,9(2):49-51. |
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| 作者姓名： | 程华才 陈家祥 马岩 潘豫节 张宏伟 |
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| 作者单位： | 安徽省马鞍山市中心医院CT/MRI室 |
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| 摘 要： | 目的探讨磁共振弥散加权成像（Diffusionweightedimaging,DWI）对肝脏局灶性病变诊断及鉴别诊断的价值。方法对68例肝局灶性病变（其中肝细胞癌17例,肝囊肿25例、肝血管瘤26例）行MRI平扫、DWI及动态增强扫描。分析各病变弥散成像的信号特点,并测量正常肝脏和病变在不同扩散敏感系数（b值）的表观弥散系数（Apparentdiffusioncoefficient,ADC）值。结果肝局灶性病变在DWI上为高信号,随b值的增加信号有不同程度下降;当b值为400s/mm2时,肝细胞癌、肝囊肿、肝血管瘤的ADC值分别为（1.20±0.50）×10-3mm2/s、（3.10±0.41）×10-3mm2/s、（2.18±0.32）×10-3mm2/s,三者存在着显著性差异。结论弥散加权成像对肝细胞癌、肝血管瘤和肝囊肿具有一定的诊断及鉴别诊断的价值。但不适宜对小病灶定性诊断。
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| 关 键 词： | 磁共振成像 弥散加权成像 表观弥散系数 肝脏病变 |
Application of Diffusion-weighted Imaging in Focal Hepatic Lesions |
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| Authors: | CHENG Hua-cai CHEN Jia-xiang Ma Yan |
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| Institution: | CHENG Hua-cai,CHEN Jia-xiang,Ma Yan,et al. Department of Radiology,Maanshan Central Hospital,Anhui Province,243000,P.R.China |
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| Abstract: | Objective To evaluate the value of magnetic resonance diffusion-weighted imaging (DWI) on diagnosis and differential diagnosis of focal liver lesions. Methods Sixty eight patients with focal hepatic lesions which included hepatocellular carcinoma(n=17), liver cyst(n=25), hepatic hemangioma(n=26) were examined by MRI plain scan, DWI and dynamic contrast-enhanced scan separately. The signal features of the lesions in the diffusion-weighted imaging were analyzed, and the apparent diffusion coefficient (ADC) va... |
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| Keywords: | Magnetic resonance imaging Diffusion weighted imaging Aparent diffusion coefficient (ADC) Focal liver lesions |
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