Yumoto E, Sanuki T, Hyodo M
Department of Otolaryngology-Head and Neck Surgery, Kumamoto University School of Medicine, Japan.
Arch Otolaryngol Head Neck Surg. 1999 Aug;125(8):883-90. doi: 10.1001/archotol.125.8.883.
To describe characteristics of 3-dimensional (3-D) computed tomographic (CT) endoscopic images of the larynx in unilateral vocal fold paralysis and the changes of the paralyzed vocal fold after phonosurgery as indicated by 3-D CT endoscopy.
A university medical center.
Twelve consecutive patients with unilateral vocal fold paralysis who underwent helical CT examination. Five of them underwent the CT examination before and after phonosurgical treatment.
Three patients underwent arytenoid adduction, and 2 underwent type 1 thyroplasty.
"Sagging," defined as caudal displacement of the vocal fold; and "thinning," defined as a decrease in the vertical thickness of the vocal fold and expansion of the ventricle on the affected side, were evaluated.
Excessive motion artifacts in one patient prevented detailed description of his 3-D images. Sagging and thinning of the vocal fold and expansion of the ventricle on the affected side were noted on 6, 11, and 8 occasions, respectively. Adduction or augmentation of the paralyzed vocal fold after phonosurgery was observed in 3-D CT endoscopic images when displayed with bony densities.
The use of 3-D CT endoscopy enables description of 3-D characteristics of unilateral vocal fold paralysis and supplements stroboscopic findings. Furthermore, CT endoscopic images, when simultaneously displayed with bony densities, may help in evaluating the effects of phonosurgical treatment of the paralyzed vocal fold.
描述单侧声带麻痹患者喉部三维（3-D）计算机断层扫描（CT）内镜图像的特征，以及3-D CT内镜显示的嗓音手术后麻痹声带的变化。
一所大学医学中心。
12例连续接受螺旋CT检查的单侧声带麻痹患者。其中5例在嗓音手术治疗前后接受了CT检查。
3例患者接受了杓状软骨内收术，2例接受了Ⅰ型甲状成形术。
评估“下垂”（定义为声带的尾侧移位）和“变薄”（定义为患侧声带垂直厚度减小和心室扩大）。
1例患者的运动伪影过多，无法详细描述其3-D图像。分别在6次、11次和8次观察中发现了患侧声带的下垂、变薄以及心室扩大。在以骨密度显示的3-D CT内镜图像中观察到了嗓音手术后麻痹声带的内收或增大。
使用3-D CT内镜能够描述单侧声带麻痹的三维特征，并补充频闪喉镜检查结果。此外，当CT内镜图像与骨密度同时显示时，可能有助于评估嗓音手术对麻痹声带的治疗效果。
