大前庭导水管畸形的CT表现及多平面重组的价值

CT findings and the value of Multiplanar Reformation of the Large Vestibular Aqueduct

目的探讨大前庭导水管的CT表现及多平面重组在诊断该病中的价值。方法18例大前庭导水管患者均经多层螺旋CT扫描的轴位扫描,经后处理获得MPR图像。结果在18位患者中17例为双侧和1例单侧扩大,扩大的导水管呈三种形态:裂隙状(6耳)、三角形(27耳)及囊袋状(2耳),其内缘均显示与前庭(19耳)或总脚(16耳)相通,导水管中段平均管径3.15mm;结合MPR图像可全面地显示导水管。结论CT能准确地判定前庭导水管扩大的存在,MPR图像能更好的显示和诊断大前庭导水管畸形。

Objective To study the CT manifestions and explore the value of multiplanar reformation in the diagnosis large vestibular aqueduct. Methods Eighteen patients with large vestibular aqueduct undergone high-resolution axial CT scanning,and obtained MPR images on wokstation. Results Seventeen cases were bilateral sides, one case single side. the formation of the enlarging vestibular aqueduct were mainly presented three types： notchlike{6 ears） ,triangular （27ears） ,and saccular（2 ears）. All of the patients showed that the medial end directly connected with the vestibule（ 19 ears） ,or common crus （16ears）. the mean diameter of midportion of the aqueduct was 3.15 mm. Combining with multiple MPR images could show the whole vestibular aqueduct. Conclusion CT can be made accurately diagnosis large vestibular aqueduct,MPR can be better display and diagnose malformation of large vestibular aqueduct.