声速测算与压迫式弹性成像对乳腺肿物诊断价值的比较

摘要

目的 通过声速匹配技术测定乳腺肿物的声速(sound velocity,SV),比较声速与压迫式弹性成像对乳腺良恶性肿物鉴别诊断的价值.方法 对75例女性患者共99个乳腺肿物进行声速匹配技术检查,获得相应的声速匹配值(zone speed index,ZSI),进而得到病灶的SV.并对乳腺肿物进行压迫式弹性成像检查,获得相应的弹性图,用5分法判断良恶性.以病理结果作为金标准,构建ROC曲线,判断两种方法对乳腺病灶的诊断价值.结果 乳腺肿物的SV在良恶性组之间的差异具有统计学意义(P=0.0001).SV判断乳腺良恶性肿物的最佳临界点为1561 m/s,ROC曲线下面积为0.842,与压迫式弹性成像技术之间的差异有统计学意义(P=0.023).SV判断乳腺恶性病变的敏感性、特异性、准确性分别为81.5％、91.7％、88.9％,与压迫式弹性成像技术之间的差异无统计学意义(P=1.0,P=0.125,P=0.146).结论 SV法与压迫式弹性成像技术均对乳腺肿物良恶性判断有较高的诊断价值.%Objective To compare the diagnostic value of sound velocity(SV) and real-time ultrasonic elastography in differentiating benign or malignant of breast lesions.Methods 75 patients with 99 lesions were examined with the zone speed index technique and real-time ultrasonic elastography respectively.Then the SVs of the lesions were calculated and elastography of the lesions were scored with 5-scoring method.The ROC curves were constructed with histology as the golden standard.Results There was significant difference between the SVs of benign and malignant breast lesions(P =0.0001).1561 m/s was the best cufoff point.And the areas under the curves (AUC) of SV and real-time ultrasonic elastography were 0.842 and 0.968,respectively.There was significant difference between the two methods of AUC (P =0.023).The sensitivity,specificity and accuracy for SV were 81.5％,91.7％,88.9％,respectively.There was no significant difference between sensitivity,specificity and accuracy of the two methods(P =1.0,P =0.125,P =0.146).Conclusions Both SV method and real-time ultrasonic elastography are helpful in the evaluation of benign or malignant of breast lesions.