锥形束CT在涎石症诊断中的应用价值

The application value of cone beam CT in the diagnosis of sialolithiasis

目的:通过比较不同的影像检查方法为涎石症患者寻找最佳的影像诊断方法。方法:分析32例涎石症患者在超声、X线、锥形束CT 3种不同影像检查方法的阳性率和阴性率,比较其敏感性、特异性、阳性预测值、阴性预测值。结果:锥形束CT的敏感性和阴性期望值(95.8%、80%)明显高于超声检查(83.3%、50%)和X线片检查(58.3%、20%),其差异有统计学意义。3种影像检查方法在特异性、阳性预测值方面的差异无统计学意义。结论:锥形束CT在诊断涎石症方面,能确定结石的数目、大小并定位,准确性高。

Objective： To find the better imaging method for the diagnosis of sialolithiasis by comparing the 3 different imaging methods. Methods： 32 cases of salivary calculus were examined by sonography, X-ray and cone beam computed tomography（CBCT） , the sensitivity, specificity, positive predictive value, negative predictive value were compared among the 3 methods. Results： The sensitivity and negative predictive value of cone beam computed tomography（95.8% and 80% ） was significantly higher than those of sonography（ 83.3% , 50.0% ） and X-ray（58.3% , 20% ） （P 〈 0. 05 ）. Of three imaging methods there was no statistical difference in specificity and positive predictive value. Conclusion： CBCT is more sensitive than sonograpby or X-ray in the diagnosis of sialolithiasis.