目的

探讨三维超声成像（3DUS）在局灶性腮腺病变的诊断与鉴别诊断中的应用价值。

方法

对33 例局灶性腮腺病变行三维超声检查，评价其立体形态、体积、与周围结构毗邻关系等信息，并初步判断病灶良恶性；诊断结果与术后病理结果进行比较，计算敏感性、特异性、阳性预测值、阴性预测值、准确性及Youden 指数等统计学指标。

结果

三维超声可以较好地显示病灶的形态、边缘及与周边结构的关系，其对病灶良恶性的判断敏感性为85.7%、特异性为100%、阳性预测值为1.0、阴性预测值为0.96、准确性为96.97%、Youden 指数为0.857。

结论

3DUS 在局灶性腮腺病变的诊断与鉴别诊断方面具有一定的应用价值。

Objective

To evaluate the significance of three dimensional ultrasonography（3DUS） in the diagnosis and the differential diagnosis of focal lesions in parotid gland.

Methods

Thirty-three focal lesions of parotid gland were examined by 3DUS. The shape and volume of the lesions， and the relationship between the lesions and adjacent organs were demonstrated. The diagnosis of 3DUS were compared with the results of pathology.

Results

3DUS can well demonstrate the shape， edge of the lesions and its relationship with the adjacent organs. For the diagnosis of the lesions by 3DUS， the sensitivity was 85.7%， sensibility was 100%， positive predict value was 1.0， negative predict value was 0.96， accuracy was 96.97%， Youden index was 0.857.

Conclusion

3DUS can provide more information about the lesions in parotid gland and is useful for the differential diagnosis.