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The analysis of CT and MRI appearances of hepatic angiomyolipomas
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF RADIOLOGY
- Issue:
- 11
- DOI:
- 10.3760/j.issn:1005-1201.2001.11.006
- Key Word:
- 血管平滑肌脂肪瘤,肝脏;体层摄影术,X线计算机;磁共振成像
Abstract： 目的分析13例肝脏血管平滑肌脂肪瘤(AML)的CT及MRI表现,进一步提高诊断准确性.方法所有病例均经手术病理证实.12例经CT检查,其中6例做过MRI检查,仅1例只做MRI检查.平扫后行增强动脉期和门脉期扫描,5例做了延迟期扫描.MRI检查行SE T1WI、快速自旋回波(FSE) T2WI和快速多层面干扰梯度回波(FMPSPGR)序列横断面动态多期增强扫描.结果 CT平扫11个病灶为低密度,1个为略高密度.动脉期所有病灶均有强化表现,8个病灶见到中心血管影.门脉期8个病灶有持续强化,有6个病灶见到中心血管影.MR T1WI上5个病灶为混杂信号,T2WI上所有病灶均为高信号,但信号强度各不相同.MR增强动脉期6个病灶有强化,1个病灶强化不明显.门脉期4个病灶有持续强化,3个为低信号.MR增强扫描中也有4个病灶显示中心血管影.结论 CT和MRI检查均可显示AML的特征,特别是病灶中脂肪成分和血管影高度提示AML的诊断.MR SE序列加脂肪抑制显示脂肪成分比CT更加敏感.CT和MR动态增强多期扫描可充分反映AML的强化特征,有助于提高AML的诊断准确性.
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