CT仿真喉镜的成像技术及临床应用

目的：探讨正常和异常喉及下咽部的CT仿真喉镜（CTVL）成像技术及临床应用。材料与方法：采用层厚3.0mm,螺距1.0,1.0mm间隔对10例还和20例经病理证实的喉及下咽部病变的患者进行CTVL成像，并与纤维喉镜，手术所见对照分析。结果：CTVL能清楚显示正常喉及下咽部的腔内结构。19例头端CTVL上显示的病变部位，大小和形态与纤维喉镜所见基本一致，1例声带息肉显示明显不如后者；2例从足侧观察肿瘤与声带和前联合的关系弥补了纤维喉镜的不足。CTVL不能显示组织的颜色变化，不易观察病变的表面状况，难以判断病变的性质及不能观察喉内结构的活动情况。结论：CTVL是一种新的，非侵袭性的方法，能清楚显示正常和异常喉及下咽部的腔内结构，是纤维喉镜的很好补充手段。

CT virtual laryngoscopy: technique and clinical application

Purpose To evaluate the technique and clinical application of CT virtual endoscopy (CTVL) in larynx and hypopharynx. Methods CTVL was performed with 3.0 mm at pitch 1.0 and 1.0 mm reconstruction interval in 10 normal subjects and 20 patients with larynx and hypopharynx diseases confirmed by pathology. The results were then compared with the findings of conventional laryngoscopy and operation. Results CTVL could clearly display the mucosal structure of the larynx and hypopharynx. The location, size and extension of lesions showed on CTVL by cranio-caudally corresponded well with that of conventional laryngoscopy in 19 cases, and 1 polyp of vocal cord detected on CTVL was much not as good as laryngoscopy. CTVL demonstrate the relationship between the tumor and vocal cords and anterior commissure by caudo-cranial approach inaccessible to fiber optic laryngoscopy in 2 cases. However, CTVL could not display the change of tissue color, and it was difficult to investigate the surface appearances, characterization of lesion and the motion of laryngeal structures such as true cord and epiglottis, etc. Conclusion CTVL is a new, non-invasive method for demonstrating the mucosal structure of normal and abnormal larynx and hypopharynx, and a good complementary method to conventional fiber optic laryngoscopy.