中文摘要：

目的 ：探讨乳腺疾病超声弹性成像在乳腺影像学报告及数据系统（Breast Imaging Reporting and Data System,BI-RADS）-US第二版中的临床应用价值。方法 ：纳入253例乳腺疾病患者共263个病灶,患者术前行常规超声检查及超声弹性成像检查,使用BI-RADS-US第二版超声弹性成像分级法、Itoh 5分法、弹性应变率比值（strain ratio,SR）法对其乳腺病灶进行BI-RADS-US分类,并将结果与病理结果对照分析。结果 ：SR联合常规超声检查诊断乳腺恶性病灶的灵敏度为92.31%,稍好于Itoh 5分法、BI-RADS-US第二版超声弹性成像分级法与常规超声的联合,但明显好于单独应用Itoh 5分法、BI-RADS-US第二版超声弹性成像分级法及SR法。在良性病灶需活检率方面,采用常规超声检查最高,为46.62%;通过SR法联合常规超声检查最低,为27.82%;BI-RADS-US第二版超声弹性成像分级法联合常规超声检查为30.83%;Itoh 5分法联合常规超声为39.85%。结论：超声弹性成像诊断乳腺病灶有一定的局限性,但超声弹性成像联合常规超声检查则能有效降低良性病灶的活检率,减少患者的痛苦。

英文摘要：

Objective To investigate the value of ultrasound elastography in differentiating breast diseases using the second edition of BI-RADS-US. Methods： Two hundred and fifty-three patients with 263 lesions were included in this studies. All of them underwent conventional ultrasonography and ultrasonic elastography before surgery. The histopathologic results were used as gold standards. Results： The sensitivity for diagnosing malignant breast disease by SR（strain ratio） of elastography combined with conventional ultrasonography was 92.31%, which was slightly higher than the combining of conventional ultrasonography with Itoh＇s 5 scores and 2nd edition of BI-RADS-US classification of elastography, and was significantly higher than using each of these methods of elastography alone. The biopsy applied rate of benign lesions was the highest in conventional ultrasounography（46.62%）, and was 27.82% in SR of elastography combined with conventional ultrasounography, 30.83% in 2nd edition BI-RADS-US classification of elastography combined with conventional ultrasounography, 39.85% in Itoh′ s 5 scores of elastography combined with conventional ultrasounography. Conclusions： Despite the limitation of elastography in the differentiation of breast diseases, elastography combined with conventional ultrasonography could reduce unnecessary biopsy and finally benefit the patients.