Morinaka S, Miyamoto S, Hidaka A
Department of Otorhinolaryngology, Kobe Teishin Hospital, 6-2-43 Kamitsutsui-dori, Chuo-ku, 651-8798, Kobe, Japan.
Auris Nasus Larynx. 2001 Apr;28(2):151-9. doi: 10.1016/s0385-8146(00)00111-5.
To evaluate helical computed tomography (CT) scanning in patients with laryngeal deviation.
Five patients with laryngeal deviation and three control subjects underwent helical CT. The laryngeal deviation was idiopathic in one patient and acquired in four. Three-dimensional (3D) images of the laryngeal cartilages and bones, 3D airway surface models, and sequential coronal and axial images were reconstructed for assessment.
The thyroid cartilage was inclined and twisted to the right in three patients, inclined to the right and twisted to the left in one patient, and inclined to the left and twisted to the right in one patient. The infero-posterior part of the thyroid cartilage, and the cricoid and arytenoid cartilages were shifted to the left in four patients. The vocal cords were at the level of C4 approximately C4/C5 in two patients, C4/C5 in one, C4/C5 approximately C5 in one, and C5 approximately C5/C6 in one. In four patients, inclination of the laryngeal cavity to the right may have induced left false vocal cord protrusion. The levels of the two false vocal cords differed in all patients. When the inclination and twisting were corrected on the computer, 3D images of the laryngeal cartilages of the patients became almost the same as those of the control subjects, except for slight deformity of the thyroid cartilage. The width of the right and left thyroid alae was measured on the computer, and was almost equal in all patients. 3D airway surface models of the left hemilarynx resembled those of the right hemilarynx when the angle of view was changed on the computer.
Three-dimensional images of the laryngeal cartilages and bones, 3D airway surface models, and sequential coronal and axial CT scans were obtained using helical CT. This method allows the 3D observation of laryngeal deviation, and viewing of images from various directions on the computer was useful to understand the characteristics of laryngeal deviation.
评估螺旋计算机断层扫描（CT）在喉偏斜患者中的应用。
5例喉偏斜患者和3例对照者接受了螺旋CT检查。1例患者的喉偏斜为特发性，4例为后天性。重建了喉软骨和骨骼的三维（3D）图像、3D气道表面模型以及连续的冠状位和轴位图像以进行评估。
3例患者的甲状软骨向右倾斜并扭转，1例向右倾斜并向左扭转，1例向左倾斜并向右扭转。4例患者甲状软骨的后下部以及环状软骨和杓状软骨向左移位。2例患者的声带位于C4水平，约在C4/C5之间；1例在C4/C5；1例约在C4/C5至C5之间；1例在C5至C5/C6之间。4例患者中，喉腔向右倾斜可能导致左侧假声带突出。所有患者双侧假声带的水平不同。在计算机上校正倾斜和扭转后，除甲状软骨有轻微畸形外，患者的喉软骨3D图像与对照者几乎相同。在计算机上测量了左右甲状软骨翼的宽度，所有患者的宽度几乎相等。当在计算机上改变视角时，左半喉的3D气道表面模型与右半喉相似。
使用螺旋CT获得了喉软骨和骨骼的三维图像、3D气道表面模型以及连续的冠状位和轴位CT扫描。该方法可对喉偏斜进行三维观察，在计算机上从各个方向查看图像有助于了解喉偏斜的特征。
