目的：探索一种能够让声阻抗系数接近的两组织界面能清晰显示的技术。方法：随机选择77例拟行甲状腺结节切除或穿刺的患者，每一例患者在术前超声检查时，先采用常规检查法得出TI-RADS诊断，并录入对照组，再采用常规结合灰阶调节技术法得出TI-RADS诊断，并录入干预组。将两组超声诊断绘制成表格，随访每一例患者的术后病理报告。结果：对比两组超声诊断与病理报告的符合情况，经统计学分析后可以认为常规结合灰阶调节技术法判断甲状腺结节性质较常规检查法在正确率、特异度和敏感度均有提高，差异有统计学意义。结论：超声局部灰阶调节技术能帮助超声医生判断甲状腺结节的性质。

Objective: To explore a kind of technology, which can make the two tissue boundary whose acoustic impedance coefficient is very close to display clearly. Methods: Randomly selected 77 cases to resection of thyroid nodules or puncture. Firstly, the routine examination method to obtain TI-RADS diagnosis and entry control group, using conventional with gray scale adjustment technology to calculate TI-RADS diagnosis and entry intervention group, when each patient in preoperative ultrasonography. The two groups were drawn into the form of ultrasound diagnosis. The postoperative pathological report of each patient was followed up. Results: Compared two groups of ultrasound diagnosis and pathologic report compliance, that routine with gray scale adjustment technology is better than conventional examination in accuracy, specificity and sensitivity, the difference is statistically significant. Conclusion: Ultrasound local gray scale adjustment technology can help doctors to determine the nature of the thyroid nodule ultrasound.