Objective To explore the more accurate excision range for liver masses preoperatively using contrast-enhanced ultrasound(CEUS). Explore the specificity , sensitivity of different ultrasonic diagnostic technique for benign and malignant liver placeholder check in order to provide more accurate preoperative ultrasound for liver operation. Methods Data of 34 cases of single hemangiomas and 26 cases of single primary hepatocellular carcinomas(HCC) confirmed pathologically in our hospital were enrolled in this study. The size of the biggest section for these masses was detected using common ultrasound and CEUS Data of the biggest size of each mass was recorded and compared between these two methods. Results For hepatic hemangioma cases,29 masses showed hyperechoic and 5 masses were hypoechoic lesions. For HCC,22 cases were hypoechoic and 4 cases were mixed echo. There is no significant difference of the liver hemangioma between sizes detected separately in artery phase,venous phase,and delayed phase using CEUS and those of them measured using the conventional ultrasound. The sizes of HCC measured in the arterial phase with CEUS were significantly larger than that were detected using common ultrasound and the venous phase and delayed phase of CEUS(all P<0.05). Conclusion The size detected in the arterial phase with CEUS is more sensitive and specified than the conventional ultrasound for malignant tumor preoperative planning.%目的：对比常规超声和超声造影在肝脏占位性病变测值的差异，探求更精准的切除范围。方法选取我院经病理证实的肝血管瘤34例和原发性肝细胞癌患者26例，均为单发病灶，比较常规超声和超声造影不同时相时病灶的最大径线。结果肝血管瘤患者中，常规超声表现为高回声29例，低回声5例；原发性肝细胞癌患者中，常规超声表现为低回声22例，混合回声4例。肝血管瘤在超声造影动脉相、静脉相、延迟相与常规超声测量肝血管瘤最大径线比较差异无统计学意义；原发性肝细胞癌在超声造影动脉相时占位病变最大径线测值最大，与常规超声及超声造影其他时相所测最大径线比较差异均有统计学意义（均P＜0．05）。结论超声造影对恶性肿瘤周边滋养血管检测较常规超声的敏感性和特异性更强，动脉相的测值在一定程度上能为原发性肝癌病灶切除提供更为精准的数据参考。
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