目的研究应用超声造影
Objective: To study the application of contrast-enhanced ultrasound
以上为机器翻译结果，长、整句建议使用 人工翻译 。
目的：应用动态灰阶超声造影技术研究肝脏占位性病变造影增强的时相变化，评价其在肝肿瘤鉴别诊断中的价值。
Objective To study the enhancement phases of focal liver lesions with dynamic gray scale sonography and evaluate its value in differential diagnosis of hepatic lesions.
目的采用循证医学的方法对超声造影诊断肝局灶性结节增生的研究进行系统评价，评估其临床应用价值并分析异质性来源。
Objective A systematic review was conducted to determine reliability of contrast-enhanced ultrasonography diagnostic tests for focal nodular hyperplasia and to explore sources of heterogeneity.
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