正常内耳内听道磁共振水成像观测

Magnetic Resonance Liquid Imaging and Measurement for Normal Inner Ear and Internal Auditory Canal

运用磁共振水成像,观察和测量正常内耳内听道解剖,并比较不同性别、侧别间的差异.对40例(80耳)听力正常志愿者行内耳内听道三维快速自旋回波序列3D-FSE序列扫描,对数据作三维容积再现(3DVR)和多平面重建(MPR)处理、观察及测量,统计归纳并比较左右侧别间男女性别间的差异.40例(80耳)的内耳内听道均能100%显示,取得半规管高度、管径、跨度、弧长、蜗底宽度、耳蜗高度等20项内耳内听道指标测量数据,除外半规管高度、后半规管高度及后半规管弧长在男女性别间差异有显著性意义(P<0.05)外,其余17项测量数据差异均无显著性意义(P>0.05).运用磁共振3D-FSE序列扫描,经3DVR或MPR图像处理后,能清晰显示内耳内听道解剖结构和精确测量解剖数据.左右侧别间无差异,男女性别间个别数据差异有待进一步论证和研究。

To observe and measure normal anatomical structure of inner ear and internal auditory canal by imaging inner ear fluid using magnetic resonance imaging（MRI） technique, the difference between left and right ear or between male＇s and female＇s by group is analyzed. Volume scans of inner ear and internal auditory canal are performed in 40 patients （80 ears） using MRI three-dimensional fast spin echo （3D-FSE） sequence.. Postprocession with three-dimensional volume rendering （3DVR） and multiplanar reconstruction （MPR） are operated to observe and measure several indexes, compared left vs. right ear and male＇s vs. female＇s by group for statistical analysis. MRI scan can completely show inner ear and internal auditory canal in all cases and achieve 20 indexes of anatomical structure. There is no significant statistical distinction between left and right ear or between male＇s and female＇s by group for 17 indexes, including height, diameter, span, arc length of three semicircular canals, bottom width, and height of cochlea, etc.（P〉0.05）. In contrast, height of lateral semicircular canal, height and arc length of posterior semicircular canal show statistical significance between male＇s and female＇s in group （P〈0.05）. MRI 3D-FSE sequence followed by 3DVR and MPR post procession can precisely show structures of inner ear and internal auditory canal, which helps to achieve anatomical indexes accurately. No statistical significance is noted between left and right ear or between male＇s and female＇s in group at most indexes. As for 3 indexes showing statistical significance between male＇s vs. female＇s by group, further researches and discuss are expected.