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Characterization of focal hepatic lesions on diffusion-weighted MRI
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF RADIOLOGY
- Issue:
- 2
- DOI:
- 10.3760/j.issn:1005-1201.2005.02.014
- Key Word:
- 磁共振成像;扩散;肝疾病
Abstract： 目的探讨MR扩散加权成像(DWI)对肝脏局灶性病变定性诊断的价值.方法对70例肝脏局灶性病变行DWI,计测表观扩散系数(ADC)值,同时作多期动态增强MRI,观察病灶各期强化模式.结果肝细胞癌、胆管细胞癌及转移癌的ADC值(单位:mm2*s-1*10-3)分别为1.33±0.17、1.23±0.17、1.29±0.13,三者之间差异无统计学意义(P>0.05);肝血管瘤、肝囊肿ADC值分别为2.33±0.22、4.04±0.51,恶性肿瘤ADC值均低于良性病变.恶性肿瘤平均ADC值1.29±0.16;与良性病变间差异有统计学意义(P<0.05).在动态增强扫描中,37.1%肝癌、78.9%胆管细胞癌与31.9%转移瘤病灶可见门静脉期与延迟期强化.结论 DWI可成为1种有用的定性诊断肝脏局灶性病变的方法.
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