实时超声弹性成像定量参数分析在甲状腺结节诊断中的初步应用

Quantitative assessment of real-time elastosonography in thyroid nodules： preliminary clinical research

目的 探讨实时超声弹性成像定量参数分析在鉴别诊断甲状腺良恶性结节中的价值.方法 分析86例甲状腺结节患者的超声弹性图像,计算病灶与周围组织的应变比值（strain ratio）,分别统计良恶性病灶的比值均数,并通过ROC曲线分析取得最合适的临界值.所有病例均经手术及病理证实.结果 良性结节的应变比值平均2.18,而恶性结节为8.48,两者差异有统计学意义（P〈0.05）.通过ROC曲线分析,取得最合适诊断临界点为3.3.结论 实时超声弹性成像定量分析为甲状腺结节的良恶性鉴别诊断提供了一种新的方法.

Objective To evaluate the value of quantitative analysis of real-time elastosonography in the differential diagnosis of benign and malignant thyroid nodules. Methods The elastograms of eight-six patients with 98 thyroid nodules were observed. The strain ratio of each lesion and the averages of those of benignancy and malignancy were calculated. With the ROC curve, the critical point of the strain ratio of different lesions was gotten. All the lesions were confirmed with surgery and pathologic examination. Results The average of strain ratio of benign nodules was 2. 18,while that of malignancy was 8. 48. The strain ratio of benign and malignant lesions were of significant difference statistically （P 〈0.05）. According to ROC curve, the critical point of strain ratio between benign and malignant lesions was 3. 3. Conclusions The quantitative analysis of real-time elastosonography is a newly valuable technique of ultrasonography which is helpful in the differential diagnosis of thyroid lesions.