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Colometer:A real-time quality feedback system for screening colonoscopy

World Journal of Gastroenterology 2012年第32期18卷 4270-4277页

作者： Dobromir Filip Xuexin Gao Leticia Angulo-Rodriguez Martin P Mintchev Shane M Devlin Alaa Rostom wayne rosen Christopher N Andrews Department of Electrical and Computer Engineering University of Calgary Calgary AB T2N 1N4 Canada Faculty of Medicine University of Calgary Calgary AB T2N 1N4 Canada

AIM:To investigate the performance of a new software-based colonoscopy quality assessment ***:The software-based system employs a novel image processing algorithm which detects the levels of image clarity,withdrawal velocity,and level of the bowel preparation in a real-time fashion from live video *** levels of image blurriness and the withdrawal velocity below which the visualization could be considered adequate have initially been determined arbitrarily by review of sample colonoscopy videos by two experienced ***,an overall colonoscopy quality rating was computed based on the percentage of the withdrawal time with adequate visualization(scored 1-5;1,when the percentage was 1%-20%;2,when the percentage was 21%-40%,etc.).In order to test the proposed velocity and blurriness thresholds,screening colonoscopy withdrawal videos from a specialized ambulatory colon cancer screening center were collected,automatically processed and *** ratings on the withdrawal were compared to the insertion in the same ***,3 experienced endoscopists reviewed the collected videos in a blinded fashion and rated the overall quality of each withdrawal(scored 1-5;1,poor;3,average;5,excellent) based on 3 major aspects:image quality,colon preparation,and withdrawal *** automated quality ratings were compared to the averaged endoscopist quality ratings using Spearman correlation ***:Fourteen screening colonoscopies were *** polyps were detected in 4/14(29%) of the collected colonoscopy video *** a proof of concept,the Colometer software rated colonoscope withdrawal as having better visualization than the insertion in the 10 videos which did not have any polyps(average percent time with adequate visualization:79% ± 5% for withdrawal and 50% ± 14% for insertion,P < 0.01).Withdrawal times during which no polyps were removed ranged from 4-12 *** median quality rating from the automa

关键词：质量评估系统反馈系统实时大肠筛检自动化系统检查质量视频信号

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