肝转移癌的超声造影表现及其临床应用价值

目的观察肝转移癌超声造影表现并探讨其临床应用价值。方法采用低机械指数实时灰阶谐波反相超声造影技术对21例共21个肝转移癌病灶进行超声造影,分析研究其造影增强各时相的特征。结果21个肝转移癌中,19个(90.5%)超声造影表现为快进快出,动脉相21个病灶均可见增强,12个(57.1%)为快速弥漫增强,8个(38.1%)为快速环状增强,余1个较大的病灶呈缓慢不均匀轻度增强;延迟相20个病灶(95.2%)呈边界清晰的低回声,3个(14.3%)发现更多的肝内病灶。结论肝转移癌的超声造影有特征性表现,可将其作为筛查及诊断的可靠依据。

Diagnostic performance of contrast-enhanced ultrasound in liver metastases and its clinical application

Objective To observe the performance of liver metastases with contrast-enhanced ultrasound(CEUS) and assess its clinical application.Methods Twenty-one patients with 21 untreated liver metastases underwent CEUS with low mechanical index imaging.The characteristic appearances of CEUS in different vascular phases were observed.Results Of 21 metastases,19(90.5%) were identified as fast-in and fast-out enhancement pattern.In the arterial phase,all the 21 lesions showed enhancement but with varied appearances:12(57.1%)showed early diffuse enhancement,8(38.1%) showed ring-like enhancement,and the remaining one lesion of large size showed slowly enhomogenous minor enhancement.In the late phase,sharp defects were found in 20 lesions(95.2%),and more lesions were detected in 3 patients(14.3%).Conclusion CEUS can show the characteristic appearance of liver metastases,and can be used for the screening and diagnosis of liver cancers.