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目的探讨超声造影对转移性肝癌的诊断价值及造影增强时相特征。方法对47例恶性肿瘤患者肝脏行常规超声检查及低机械指数超声造影检查,对肝内转移性病灶超声造影表现分析其造影增强各时相的特征。结果47例患者常规超声共检出病灶148个,超声造影共检出357个。肝转移癌病灶增强模式可分为3型:Ⅰ型,病灶动脉期周边环状快速增强,病灶内部呈低或无增强,之后周边增强部分迅速减退;Ⅱ型,病灶于动脉期呈快速整体增强(均匀型或不均匀型)并迅速减退;Ⅲ型,病灶于动脉期呈“面包圈”样增强,门脉期增强减退呈低增强或无增强。结论超声造影可明显提高对肝脏转移病灶检出率;其造影增强特点因其原发灶不同、血供丰富与否亦不相同。
Objective To investigate the diagnostic value of contrast-enhanced ultrasound in the diagnosis of metastatic liver cancer and the enhanced phase features of contrast enhancement. Methods Forty-seven patients with malignant tumor underwent conventional ultrasonography and low contrast-enhanced contrast-enhanced ultrasonography, and analyzed the characteristics of intrahepatic metastatic lesions by contrast-enhanced ultrasonography. Results A total of 148 lesions were detected by conventional ultrasound and 357 by contrast-enhanced ultrasound. The enhancement modes of hepatic metastatic lesions can be divided into three types: type Ⅰ, the peripheral arterial phase of the lesion is enhanced rapidly and the internal lesion is low or no enhancement, and then the peripheral enhanced part is rapidly decreased; type Ⅱ, the lesions are rapidly and overall enhanced rapidly in the arterial phase (Uniform or non-uniform type) and rapidly diminished; type Ⅲ, lesions in the arterial phase showed “bagel” -like enhancement, portal venous enhancement showed no enhancement or enhancement. Conclusion Contrast-enhanced ultrasound can significantly improve the detection rate of liver metastases; its contrast-enhanced features are not the same because of its different primary tumors.