评价超声、多层螺旋CT、磁共振影像学检查在小于2 cm肝脏肿块诊断中的价值。

回顾性分析2010年1月至2012年1月在华中科技大学同济医学院附属同济医院肝脏外科中心就诊的53例资料完整的肝脏肿块患者临床资料，分别进行超声造影、多层螺旋CT增强、磁共振（PWI+DWI）检查，结合临床特征得出相应的初步诊断，再与病理和随访结果比较,分析三种影像学诊断的敏感度、特异度、准确性。

病理和随访证实27例为原发性肝癌，10例肝脏局造型结节增生，9例肝血管瘤，4例转移性瘤，2例肝脏血管平滑肌脂肪瘤，1例囊肿混合感染。肝脏的PWI+DWI在诊断中表现出较高的敏感度、特异度和准确性（91%、97%、93%），稍优于超声造影，明显优于增强CT （P<0.05）。

肝脏PWI+DWI和超声造影在小于2 cm肝脏肿块诊断中具有较高价值。

To evaluate the value of diagnosis for less than 2 cm liver lesions using contrast-enhanced ultrasound, contrast-enhanced computed tomography, enhanced perfusion imaging and diffusion imaging.

Fifty-three patients with nodules less than 2 cm underwent standardized contrast-enhanced ultrasound, CT, and MRI scans, respectively. Final diagnosis was determined by pathology or follow-up. Comparative analysis of its diagnostic sensitivity, specificity and accuracy was performed retrospectively.

Based on the pathology or follow-up for patients, we confirmed that there were 27 patients of primary liver cancer, 10 focal nodular hyperplasia, 9 hemangioma, 4 metastatic tumor, 2 liver angioleiomyolipoma, and 1 liver cyst coincidence with infection. Combined with the three diagnosis tests, we found that enhanced perfusion imaging and diffusion imaging had a higher sensitivity, specifity and accuracy (91%, 97%, 93%, respectively) than contrast-enhanced ultrasound, and was significantly prior to computed tomography (P<0.05).

MR enhanced perfusion imaging and diffusion imaging and contrast-enhanced ultrasound has an excellent diagnostic value for liver tumors <2 cm.