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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 | Brain CT perfusion provides additional useful information in severe traumatic brain injury显示文摘 | Cino B Andrew B Shane N | 2013 | Injury2013，44，9： | 1 |
| 3 | Adsorption of heavy metals by green algae and ground rice hulls显示文摘 | Greenlaw P N Shane B S | 1993 | J Environ Sci Health A1993，28，： | 1 |
| 4 | Creative personality, opportunity recognition and the tendency to start businesses: A study of their genetic predispositions显示文摘 | Shane S Nicolao N | 2014 | Journal of Business Venturing2014，，30： | 1 |
| 5 | Prediction of workpiece deformation in a fixture system using the finite element method显示文摘 | Shane P Siebenaler S N Melkote | 2006 | Intemational Journal of Machine Tools~Manufacture2006，46，1： | 1 |
| 6 | NSA able to foil basic safeguards of privacy on web显示文摘 | Perlroth N Larson J Shane S | 2013 | The New York Times2013，6，： | 1 |
| 7 | Application of Re- ceptor-specific Risk Distribution in the Arsenic Contami- nated Land Management显示文摘 | Chen I C Shane N Wang G S | 2013 | Journal of Hazardous Mate- rials2013，262，11： | 1 |
| 8 | Diaphragm unloading via controlled mechanical ventilation alters the gene expression profile显示文摘 | DeRuisseau KC Shanely RA Akunuri N | 2005 | Am J Respir Crit Care Med2005，172，10： | 1 |
| 9 | The promise of entrepreneurship as a field of research显示文摘 | Shane S Venkataranian N | 2000 | Academy of Management Review2000，25，1： | 1 |
| 10 | Adsorption of heavy metals by green algae and ground rice hulls显示文摘 | Roy D Greenlaw P N Shane B S | 1993 | J Environ Sci Health A1993，，28： | 1 |
| 11 | Microstructural and pore solution changes induced by rapid chloride permeability test measured by impedance spectroscopy显示文摘 | SHANE J D ALDEA BOUXSEIN N F | 1999 | Concr Sci Eng1999，1，2： | 1 |
| 12 | Statin therapy in heart failure: Prognostic effects and potential mechanisms 显示文摘 | Shanes J G Minadeo K N Moret A | 2007 | Am Heart J2007，154，4： | 1 |
| 13 | Chia seed supplementation and disease risk factors in overweight women:a metabolomics investigation显示文摘 | Nieman D C Gillitt N Jin F Henson D A Kennerly K Shanely R A | 2012 | J Altern Complement Med2012，18，： | 1 |
| 14 | Expression of VEGF-A、B、C、D and their relationships to lymph node status in lung adenocareinoma显示文摘 | Toshino N Shane I Mashahide T | 2000 | Clin Cancer Res2000，，6： | 1 |
| 15 | Neurologic manifestations of pediatric novel hlnl influenza infection显示文摘 | Rellosa N Bloch KC Shane AL | 2011 | Pediatr Infect Dis J2011，31，2： | 1 |
| 16 | Recommenda- tions on screening for prostate cancer with the prostate- specific antigen test显示文摘 | Bell N Connor Gorber S Shane A | 2014 | CMAJ2014，186，16： | 1 |
| 17 | Infectious bursal disease显示文摘 | Lasher H N Shane S M | 1994 | Worlds Poultry Science Joumal1994，50，： | 1 |
| 18 | Prediction of Workpiece Deformation in a Fixture System Using the Finite Element Method显示文摘 | Shane P Siebenaler Shreyes N Melkote | 2006 | International Journal of Machine Too1s &Manufacture2006，46，1： | 1 |
| 19 | Inside or outside the 显示文摘 | FINI R LACETERA N SHANE S | 2010 | Research Policy2010，39，： | 1 |
| 20 | Opportunity recognition and the tendency to be an entrepreneur:a bivariate genetics perspective显示文摘 | NICOLAU N SHANE S CHERKAS L | 2009 | Organizational Behavior and Human Decision Processes2009，110，： | 1 |
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