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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 | Emotional Brand Attachment and Brand Personality: The Relative Importance of the Actual and the Ideal Self 显示文摘 | Lucia M Harley K Wayne D H Bettina N | 2011 | Journal of Marketing2011，75，4： | 1 |
| 3 | Biological and immunological characterization of multiple GnRH in an opisthobranch mollusk, Aplysia californica 显示文摘 | Zhang L Wayne N L Sherwood N M | 2000 | General and Comparative Endocrinology2000，118，1： | 1 |
| 4 | The present status of QSAR in toxicology 显示文摘 | Wayne Schultza T Cronin M T D Netzeva T I N | 2003 | Journal of Molecular Structure: THEOCHEM2003，622，： | 1 |
| 5 | Reproductive refractoriness of theewe to inductive photoperiod is not caused by an alteration of the circadian secretion of melatonin显示文摘 | Malpaux B Moenter S M Wayne N L | 1988 | Neuroendocrinology1988，48，： | 1 |
| 6 | To pour or not to pour: the dilemma of assessing your aluminium melt' s cleanliness 显示文摘 | MICHAEL J R WAYNE M C PAUL N | 1996 | Modem Casting1996，，2： | 1 |
| 7 | Hypoxia inducible factor1alpha is a positive factor in solid tumor growth显示文摘 | Heather E R Michelle P Wayne M N | 2000 | Cancer Res2000，60，15： | 1 |
| 8 | Hypoxia Inducible Factor Lalpha is a Positive Factor in Solid Tumor Growth 显示文摘 | Heather E R Michelle P Wayne M N | 2000 | Cancer Res2000，，60： | 1 |
| 9 | Ductility of square- confined concrete columns 显示文摘 | Park R Priestley M J N Wayne D G | 1982 | ASCE Journal of the Structural Division1982，108，4： | 1 |
| 10 | Creation and evaluation of a medium heavy-duty truck test cycle显示文摘 | CLARK N N GAUTAM M WAYNE W S | | 0，，04： | 1 |
| 11 | XPS identification of bulk hole defects and itinerant Fe 3d electrons in natural troilite (FeS) 显示文摘 | William M Skinner H Wayne N Allen R Pratt | 2004 | Geochimica et Cosmochimica Acta2004，68，10： | 1 |
| 12 | Port Service Chains and Port Performance Evaluation 显示文摘 | WAYNE K T MAN W N ERIKA M | 2014 | Transpor- tation Research Part E: Logistics and Transportation Re- view2014，69，1： | 1 |
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