超声弹性成像与声脉冲辐射力成像技术对甲状腺结节的诊断价值

目的研究超声弹性成像(ultrasound elasticity imaging,UE)七分法及声脉冲辐射力(acoustic radiationforce impulse,ARFI)成像技术对甲状腺良恶性结节鉴别诊断的价值。方法对76例患者100个甲状腺结节采用UE七分法进行评价,用ARFI定量测定结节内剪切波速度(shear wave elocity,SWV),以病理诊断作为金标准,评价两种方法的诊断价值。结果诊断甲状腺良恶性结节,UE七分法的最佳分界点为评分≥5,灵敏度为55.0%,特异度为92.5%,准确率为85%;ARFI最大SWV值的最佳诊断分界点为4.25,灵敏度为55%,特异度为95%,准确率为87%;中位数SWV值的最佳诊断分界点为2.57,灵敏度为70.0%、特异度为82.5%,准确率为80.0%。结论 UE七分法及ARFI均对甲状腺良恶性结节的鉴别诊断具有一定价值,方法间无明显差异。

Ultrasound Elastography and Acoustic Radiation Force Impulse Technique on Diagnosis of Benign and Malignant Thyroid Nodules

Objective To study the differential diagnosis value on thyroid nodules of ultrasonic elasticity imaging （UE） seven points method and acoustic radiation force impulse （ARFI） imaging technique. Methods A total of 100 thy- roid nodules in 76 patients were evaluated by using UE seven points method. ARFI quantitative method was utilized to de- termine the shear wave velocity （SWV） of the nodule. Pathological diagnosis was as the gold standard to evaluate the di- agnosis value of the two methods. Results For the diagnosis of benign and malignant thyroid nodules, the optimal cut-off score of UE seven points method was ≥5, the sensitivity was 55.0%, the specificity was 92. 5% and the accurate rate was 85.0% ; the optimal cut-off point for the maximum SWV of ARFI was 4. 25, the sensitivity was 55.0%, the specific- ity was 95.0~ and the accurate rate was 87. 0% ; the optimal cut-off point for the medium SWV of ARFI was 2. 57, the sensitivity was 70. 0%, the specificity was 82. 5% and the accurate rate was 80. 0%. Conclusion UE seven points method and ARFI have certain differential diagnosis value on benign and malignant thyroid nodules and they have no obvious difference.