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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 | Tadahiro uemura bone marrow derived endothelial progenitor cells and endothelial cells may contribute to endothelial repair in the kidney immediately after isehemia-reperfusion 显示文摘 | Osun K Shane M Nan L | 2010 | J Histochem Cytochem2010，58，8： | 1 |
| 3 | Association between his- tory and physical examination factors and change in lumbar muhifidus muscle after spinal manipulation in patients with low back pain显示文摘 | Shane L Julie M Jeffrey J | 2012 | J Electromyogr Kinesiol2012，22，5： | 1 |
| 4 | Structure and functioning of cluster roots and plant response to phosphate deficiency显示文摘 | Lambers H Cramer M D Shane M W | 2003 | Plant and Soil2003，248，： | 1 |
| 5 | Shoot P status regulates cluster-root growth and citrate exudation in Lupinus albus grown with a divided root system 显示文摘 | Shane M W Vos M D E Roock S D E | 2003 | Plant Cell Environ2003，26，2： | 1 |
| 6 | Mixing characterisation of full-scale membrane bioreactors: CFD modelling with experimental validation 显示文摘 | Brannock M Wang Y Shane C | 2010 | Water Research2010，44，10： | 1 |
| 7 | CFD simulations of membrane filtration zone in a submerged hollow fiber membrane bioreactor using a porous media approach 显示文摘 | Wang Y Brannock M Shane C | 2010 | Journal of Membrane Science2010，363，12： | 1 |
| 8 | Kinetic studies of polyurethane polymerization with Raman spectroscopy 显示文摘 | PARNELL SHANE MIN K CAKMAK M | 2003 | Polymer2003，44，18： | 1 |
| 9 | Development and validation method for silica determination by septrophotometry in some herbs and pharmaceutical formulations 显示文摘 | Xia X P Robert B S Shane M | 2000 | Analytical Letter2000，33，3： | 1 |
| 10 | Animal welfare in cross-ventilated,compost-bedded pack,and nat-urally ventilated dairy barns in the upper Midwest 显示文摘 | Lobeck K M Endres M I Shane E M | 2011 | Journal of Dairy science2011，94，11： | 1 |
| 11 | A prisoner's dilemma approach to entrepreneur-venture capitalist relationships显示文摘 | CABLE D M SHANE S | 1997 | Academy of Management Review1997，22，： | 1 |
| 12 | Natural colorless Ia B diamond with Silicon-Vacancy defect center显示文摘 | THOMAS M M SHANE F M | 2014 | Gems&Gemology2014，50，4： | 1 |
| 13 | Effect of the interfacial transition zone on the conductivity of Portland cement mortars 显示文摘 | Shane J D Mason T O Jennings H M | 2000 | Am Ceram SOc2000，83，5： | 1 |
| 14 | Diseases of specialized extensively held flocks显示文摘 | Shane S M | 2004 | World Poultry2004，20，5： | 1 |
| 15 | Effect of the interfacial transition zone on the conductivity of Portland cement mortars 显示文摘 | Shane J D Mason T O Jenninga H M | 2000 | Journal of the American Ceramic Society2000，83，5： | 1 |
| 16 | Tissue and cellular phosphorus storage during development of phosphorus toxicity in Hakea prostrata (Proteaceae)显示文摘 | Shane M W McCully M E Lambers H | 2004 | Journal of Experimental Botany2004，55，： | 1 |
| 17 | Ecology and epidemiology of avian influenza viruses in wild bird population 显示文摘 | Stallknecht D E Shane S M | 1988 | Avian Dis1988，31，： | 1 |
| 18 | Effect of the interracial lransition zone the conductivity of Portland cement moaars显示文摘 | SHANE J D MASIN T O JENNINGS H M | 2000 | J Am Ceram Soc2000，83，5： | 1 |
| 19 | Host range of avian influenza vi- rus in free-living birds显示文摘 | Stallknecht D E Shane S M | 1988 | Vet Res Commun1988，12，23： | 1 |
| 20 | Root structure and functioning for efficient acquisition of phosphorus: matching morpho- logical and physiological traits显示文摘 | Lambers H Shane M W Veneklaas E J | 2006 | Annals of Botany2006，98，4： | 1 |
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