Abstract:

Objective To evaluate the clinical application of helical CT in larynx and hypopharynx carcinoma.  Methods  45 patients with larynx orhypopharynx carcinoma were confirmed by fibrolaryngoscope and histopathology. All were subjected to CT scanning，  MPR, CTVE, and transparent 3D VRT images were reconstructed before the operations.  Results There were no significantly  differences between transection image and histopathology（Q=0.68，P＞0.05）, between MPR and histopathology（Q=0.34，P＞0.05）,　and between CTVE and fibro laryngoscope（Q=0.59，P＞0.05）in diagnosis of larynx and hypopharynx carcinoma. However, the fibrolaryngoscope was better than CTVE or VRT in demonstrating membrane carcinoma of the larynx andhypopharynx（Q=5.60，P＜0.01）.   Conclusion  Transection image in combination with MPR, CTVE,and VRT images could improve the diagnostic value of multi-slice helical CT in larynx and hypopharynx carcinoma.

Key words: Laryngeal carcinoma; Hypopharynx carcinoma; Computer Tomography; Image post-processing