超声造影、二维超声及增强CT检出肝转移癌的价值比较

Detection of hepatic metastases by contrast-enhanced ultrasound compared with conventional ultrasound and contrast-enhanced computed tomography

目的比较常规二维超声、超声造影（CEUS）及增强CT（CECT）对肝转移癌的检出率，探讨CEUS对肝转移癌的应用价值。方法对97例已确诊肝转移癌患者进行常规超声、CEUS及CECT检查，比较三种影像学方法对肝转移癌的检出。结果肝转移癌CEUS延迟期均呈低回声充盈缺损，动脉期表现为团状增强、环状增强、不均匀增强、低增强、等增强等五种增强模式。常规超声和CEUS检出转移灶数目分别为（1．6±1．2）灶／例和（2．6±1．9）灶／例（P〈0．05），检出率分别为53．4％和87．1oA（P〈0．05）。CEUS与CECT对转移癌检出差异无统计学意义。结论CEUS较常规超声明显提高了对肝转移癌的检出。

Objective To evaluate the role of contrast-enhanced ultrasound （CEUS） on the the detection of hepatic metastases in comparison with conventional ultrasonography （US） and contrastenhanced computed tomography （CECT）. Methods Ninety-seven patients with hepatic metastases underwent US,CEUS and CECT images. Their detection of hepatic metastases were compared. Results Hepatic metastases showed five enhancement patterns with CEUS, including bolus hyper-enhancement, peripheral rim enhancement, inhomogeneous enhancement with necrosis, hypo-enhancement, isoenhancement with liver parenchyma,ali hepatic metastases showed dark defects in portal and delayed phase. The mean number of metastases at CEUS was greater than that of US （2.6 ± 1.9 vs 1.6± 1.2, P 〈0.05）. The detection of hepatic metastases was 53.4% and 87.1 % respectively（ P 〈0.05）. CEUS and CECT have no statistically significant difference in the detection of hepatic metastases （ P 〉0.05）. Conclusions CEUS can improve detection of hepatic metastases.