{'fraction_non_alphanumeric': 0.029081295439524125, 'fraction_numerical': 0.015862524785194978, 'mean_word_length': 6.0092592592592595, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Application of upper airway 3-D CT reconstruction in sleep-disordered breathing

PURPOSE:To evaluate the upper airway 3-D CT reconstruction in diagnosis and stricture localization of SDB patients by comparing between SDB group and healthy control group.METHODS:100 SDB male patients(diagnosed by PSG)and 60 healthy male persons were included in this study.Upper airway 3-D CT scanning was taken and then the CT data of the upper airway were reconstructed,measured and analyzed,including anterior-posterior dimension,lateral dimension,cross section area etc.The upper airway volume was measured by VR technique in GE advantage workstation.SPSS 11.5 software package was used for Student's t test and related analysis.RESULTS:3-D CT reconstruction showed precise anatomic structure and stricture location of the upper airway.There were significant differences in AP,LAT,CSA,volume of the retropalatal region and retroglossal region,LSP,THSP and mucosal thickness of the posterior pharyngeal wall between SDB group and heathy control group(P0.05).The SDB patients' upper airway compliance measured by Mueller examination was significantly different from the controls,which helped to localize the stricture position.CONCLUSION:Upper airway CT 3-D reconstruction shows special advantage in diagnosis and localization of obstruction of SDB and it is worth of wider utilization.Supported by Shanghai Leading Academic Discipline Project(Y0203)and Research Fund of Shanghai Municipal Education Commission(Grant No.04BB17).