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| 1 | Colometer:A real-time quality feedback system for screening colonoscopy显示文摘AIM:To investigate the performance of a new software-based colonoscopy quality assessment system.METHODS: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 signal.Threshold 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 endoscopists.Subsequently,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 rated.Quality ratings on the withdrawal were compared to the insertion in the same patients.Then,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 velocity.The automated quality ratings were compared to the averaged endoscopist quality ratings using Spearman correlation coefficient.RESULTS:Fourteen screening colonoscopies were assessed.Adenomatous polyps were detected in 4/14(29%) of the collected colonoscopy video samples.As 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 min.The median quality rating from the automated system and the reviewers was 3.45 [interquartile range(IQR),3.1-3.68] and 3.00(IQR,2.33-3.67) respectively for all colonoscopy video samples.The automated rating revealed a strong correlation with the reviewer's rating(ρ coefficient= 0.65,P = 0.01).There was good correlation of the automated overall quality rating and the mean endoscopist withdrawal speed rating(Spearman r coefficient= 0.59,P = 0.03).There was no correlation of automated overall quality rating with mean endoscopists image quality rating(Spearman r coefficient= 0.41,P = 0.15).CONCLUSION:The results from a novel automated real-time colonoscopy quality feedback system strongly agreed with the endoscopists' quality assessments.Further study is required to validate this approach. | Dobromir Filip Xuexin Gao Leticia Angulo-Rodriguez Martin P Mintchev Shane M Devlin Alaa Rostom Wayne Rosen Christopher N Andrews | 2012 | World Journal of Gastroenterology2012，18，32： | 2 |
| 2 | Towards a common benchmark for long-term process control and monitoring performance evaluation 显示文摘 | Rosen C Jeppsson U Vanrolleghem P A | 2004 | Water Sci Technol2004，50，11： | 1 |
| 3 | Fabrication of high-reflectance Mo-Si multilayer mirrors by planar-magnetron sputtering显示文摘 | Stearns D G Rosen R S Vernon S P | 1991 | J Vac Sci Technol1991，9，： | 1 |
| 4 | Synthetic Aperture radar Interferometry显示文摘 | ROSEN P A HENSELEY S JOUGHIN I R | 2000 | Proceedings of IEEE2000，88，3： | 1 |
| 5 | Pure natural orifice transluminal endoscopic surgery (NOTES) nephrectomy using standard laparoscopic in- struments in the porcine model显示文摘 | Isariyawongse J P McGee M F Rosen M J | 2008 | J Endourol2008，22，： | 1 |
| 6 | Pathological prognostic factors in Stage(T1N0M0)Iand Stage Ⅱ(T1N1M0)breast carcinoma:a study of 644 patients with median follow-up of 18 years显示文摘 | Rosen PP Groshen S Salgo P | | 0，，09： | 1 |
| 7 | Transcriptional regulation of adipogenesis显示文摘 | Rosen ED Walkey CJ Puigserver P | | 0，，05： | 1 |
| 8 | Rank-order tournament as optimum labor contracts 显示文摘 | Lazear E P Rosen S | 1981 | Journal of Political Economy1981，89，5： | 1 |
| 9 | The zntA gene of Es- cherichia coli encodes a Zn(11)-translocating P-type ATPase显示文摘 | Rensing C Mitra B Rosen B P | 1997 | Proceedings of the National Academy of Sci- ences of the United States of America1997，94，14： | 1 |
| 10 | Safety and efficacy of a single-rod etonogestrel implant (Implanon): results from 11 international clinical trials显示文摘 | Darney P Patel A Rosen K | 2009 | Fertil Steril2009，91，5： | 1 |
| 11 | Immune privilige and FasL: two ways to inactive effector cytotoxic T lymphocytes by FasL- expressing cells显示文摘 | Li JH Rosen D Sondel P | 2002 | Immunology2002，115，3： | 1 |
| 12 | The repulsive poential of normal helium atoms显示文摘 | Rosen P | 1950 | Journal of Chemical Physics1950，18，9： | 1 |
| 13 | Hensley S1 Atmospheric Effects in Interferometric Synthetic Aperture Radar Surface De formation and Topographic Maps显示文摘 | Zebker H A Rosen P A | 1997 | Journal of Geophysi- cal Research1997，102，75： | 1 |
| 14 | On the Deriva- tion of Coseismic Displacement Fields Using Differential Ra- dar Interferometry: The Landers Earthquake显示文摘 | Zebker H A Rosen P A Goldstein R M | 1994 | Journal of Geophysical Research: Solid Earth (1978 - 2012)1994，99，19： | 1 |
| 15 | The role of oxidative stress in the onset and progression of diabetes and its complication:a summary of a Congress Series sponsored by UNESCOMCBN,the American Diabetes Association,and the German Society显示文摘 | Rosen P Nawroth PP King G | 2001 | Diabetes Metab Res Rev2001，17，： | 1 |
| 16 | Synthetic Aperture Radar Interferometry显示文摘 | Rosen P A Hensley S Joughin I R | 2000 | Proceedings of the IEEE2000，88，3： | 1 |
| 17 | Carcinoma arising from preexisting pregnancy-like and cystic hypersecretory hyperplasia lesions of the breast:a clinicopathologic study of 9 patients显示文摘 | Shin S J Rosen P P | 2004 | Am J Surg Pathol2004，28，： | 1 |
| 18 | Implications of modularity on product design for the life cycle 显示文摘 | NEWCOMB P J BRAS B ROSEN D W | 1998 | Journal of Mechanical Design Transactions of the ASME1998，120，3： | 1 |
| 19 | Postoperative intraocular lens rotation 显示文摘 | Patel C Ormonde S Rosen P | 1999 | Ophthalmology1999，106，： | 1 |
| 20 | Multilayer mirror technology for soft X ray projection lithography显示文摘 | Stearns D G Rosen R S Vernon S P | 1993 | Appl Opt1993，32，69： | 1 |
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