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目的探讨3.0T磁共振动态增强扫描对富血供肝肿瘤的鉴别诊断价值。方法对40例富血供肝肿瘤(肝细胞癌26例,海绵状血管瘤12例,富血供转移瘤2例)相继进行MR平扫及3D FAME序列多期动态增强扫描,包括肝动脉期、门静脉期、平衡期及延迟期,观察病灶各期的强化特征。并利用动态强化自动分析软件及时间-信号强度曲线分析各种病变的曲线类型。结果富血供肝细胞癌的时间-信号强度曲线分为两种类型:Ⅰ型(速升速降)、Ⅱ型(速升缓降)。26例肝细胞癌中69%(18/26)表现为Ⅰ型曲线类型,31%(8/26)表现Ⅱ型曲线类型。肝血管瘤的动态增强曲线分为两种类型:Ⅰ型(缓升平坦型)、Ⅱ型(速升平坦型)。12例血管瘤中67%(8/12)表现为Ⅰ型曲线类型,33%(4/12)表现Ⅱ型曲线类型。2例富血供转移瘤表现为早期周边环状强化。结论 3.0T磁共振动态增强扫描有助于富血供肝肿瘤的诊断及鉴别诊断。
Objective To investigate the differential diagnostic value of dynamic contrast-enhanced 3.0T magnetic resonance imaging in blood-rich donor liver cancer. Methods Forty blood-rich donors (26 hepatocellular carcinomas, 12 cavernous hemangiomas and 2 blood-rich metastatic tumors) were scanned by MR plain scan and 3D FAME sequence multi-phase dynamic contrast-enhanced scanning including hepatic arterial phase , Portal venous phase, balance phase and delayed phase, observe the enhanced features of each stage of the lesion. And the use of dynamic enhanced automatic analysis software and time-signal strength curve analysis of various types of lesions curve. Results The time-signal intensity curves of blood-rich hepatocellular carcinoma were divided into two types: type Ⅰ (rapid ascending and descending) and type Ⅱ (ascending and descending). In 26 cases of hepatocellular carcinoma, 69% (18/26) showed type Ⅰ curve and 31% (8/26) showed type Ⅱ curve. Dynamic enhancement curve of hepatic hemangioma can be divided into two types: type Ⅰ (flat type), type Ⅱ (flat type). 67% (8/12) of 12 hemangiomas showed type Ⅰ curve and 33% (4/12) showed type Ⅱ curve. Two cases of blood-rich metastases showed early peripheral enhancement. Conclusion Dynamic contrast-enhanced 3.0T magnetic resonance imaging is helpful for the diagnosis and differential diagnosis of blood-rich donor liver tumors.