喉近全切除术后发音管发音不理想通常意味着发音管腔太小或阻塞。普通的轴位CT对显示发音管的功能意义不大，其扫描及间歇时间长，所得的影像常有伪影。对59例喉近全切除术后病人行螺旋CT扫描，以三维影像重建显示发音管之动态解剖及开放形态。扫描层厚smm，扫描时间1秒。扫描 Sub-total hysterectomy vocal tube pronunciation is not ideal usually means that the lumen is too small or obstruction. Common axial CT display tube pronunciation function is not meaningful, the scanning and intermittent long time, the resulting image often artifacts. Spiral CT scan was performed on 59 cases of subtotal thyroidectomy, and the dynamic anatomy and open morphology of the umberel were revealed by three-dimensional image reconstruction. Scanning layer thickness smm, scanning time of 1 second. scanning