三维图像上颌窦口面积的测量

Measurement of ostium area of maxillary sinus on three-dimensional imaging

目的 探讨正常和窦口引流通畅的上颌窦炎症患者上颌窦口、筛漏斗外口面积 ,并比较二者的差异。方法 经过螺旋CT冠状位扫描或轴位扫描的原始数据被传输到SunUltra 10Aw 3 1工作站上 ,然后利用Navigator软件行仿真内镜成像 ,调节CT仿真内镜阈值 ,观察窦口 鼻道复合体(ostium meatuscomplex ,OMC)等解剖结构 ,测量像素面积。在相同物距、视角等条件下 ,测量某一线段在三维图像和二维图像上的像素比 ,计算出面积。对正常组数值与炎症组数值进行比较。结果 鼻甲、鼻道和窦口 鼻道复合体等结构在仿真内镜下能更好地被显示 ,正常组上颌窦口的面积为 (16 45± 1 2 1)mm2 ,炎症组上颌窦口面积为 (18 2 8± 2 12 )mm2 。正常组筛漏斗外口面积为 (15 0 7± 0 78)mm2 ,炎症组筛漏斗外口为 (17 19± 1 5 9)mm2 。结论 正常组与炎症组上颌窦自然口面积无显著性差异 ,而筛漏斗外口面积差异有显著性 。

Objective To measure the ostium area of normal maxillary sinus and maxillary sinus with inflammation on virtual endoscopy. Methods After scanning on coronal or axial position, data were transferred to workstation. Such anatomic structures as ostiomeatal complex(OMC) were viewed by virtual endoscopy (VE). Under the same condition, pixel/mm was worked out. Results Turbinates?meati and ostiomeatal complex were clearly viewed by virtual endoscopy(VE). The area of normal maxillary ostium was (16.45±1.21) mm 2; the area of abnormal ostium was (18.28±2.12) mm 2. The outside area of ethmoid infundibulum was (15.07±0.78) mm 2 with normal maxillary sinus, and (17.19±1.59) mm 2 maxillary sinus with inflamed. Conclusions The areas of mormal and inflamed maxillary sinuses are equal, the outside areas of ethmoid infundibulum are unequal for normal maxillary sinus and maxillary sinus with inflammation.