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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 | Intrapartum prediction of macrosomia;accuracy of abdominal circumference estimation显示文摘 | Alaa N Momtaz M | 2001 | Gynecol Obstet Invest2001，51，2： | 1 |
| 3 | Biogas production from crop residues and aquatic weeds 显示文摘 | El-Shinnawi M M Alaa ei - Din M N El- Shimi S A | 1989 | Resources Conservation and Recycling1989，3，1： | 1 |
| 4 | Biogas production from crop residues and aquatic weeds显示文摘 | EL-SHINNAWI M M ALAA EL-DIN M N EL-SHIMI S A | 1989 | Resources Conservation and Recycling1989，3，1： | 1 |
| 5 | Intrapartum prediction of macrosomia :accuracy of abdominal circumference estimation显示文摘 | Al-nany H Alaa N Momtaz M | 2000 | Gynecol Obstet Invest2000，51，2： | 1 |
| 6 | Weak solutions of some quasilinear elliptic equations with data measures 显示文摘 | Alaa N Pierre M | 1993 | SIAM J Math Anal1993，24，： | 1 |
| 7 | Three-dimensionalultrasonography in the evaluation of the uterine cavity显示文摘 | Mohamed M Momtaz MD Alaa N | | 0，，01： | 1 |
| 8 | Biosorption of lead(Ⅱ),cadmium(Ⅱ),copper (Ⅱ) and nickel (Ⅱ) by anaerobic granular biomass显示文摘 | Alaa H Hawari Catherine N | 2006 | Bioresource Technology2006，97，： | 1 |
| 9 | Nitrogen transformations in soil and rhizosphere of rice plants 显示文摘 | Mahmoud S A Z Ishac Y Z Alaa El-Din M N | 1984 | Zentmlblatt fib' Mikrobiologie1984，139，： | 1 |
| 10 | Biogas production from crop residues and aquatic weeds显示文摘 | El-Shinnawi M M Alaa El-Din M N El-Shimi S A | 1989 | Resources Conservation and Recycling1989，3，1： | 1 |
| 11 | Development of a rapid im- munochromatographic test using a recombinant thrombospondin- related adhesive protein of Babesia gibsoni 显示文摘 | Goo Y K Lee N Alaa T M | 2012 | Vet Parasitol2012，190，34： | 1 |
| 12 | Biogas production from crop residues and aquatic weeds显示文摘 | El-Shinnawi M M Alaa El-Din M N El-Shimi S A | 1989 | Resources Conservation and Recycling1989，3，1： | 1 |
| 13 | Computational simulation of the bone remodeling using the finite element method:an elastic-damage theory for smal displacements显示文摘 | Idhammad A Abdali A Alaa N | | 0，，： | 1 |
| 14 | Intrapartum prediction of macrosomia :accuracy of abdominal circumference estimation显示文摘 | Al-Inany H Alaa N Momtaz M | 2001 | Gynecologic and Obstetric Investigation2001，51，2： | 1 |
| 15 | Intrapartum prediction of macrosomia:accuracy of abdominal circumference estimation显示文摘 | Alnamy H Alaa N Monmtaz M | 2000 | Gynecol Obstet Invest2000，51，2： | 1 |
| 16 | Intrapartum prediction of macrosomia:accuracy of abdominal circumference estimation显示文摘 | Al-Inany H Alaa N Momtaz M | 2001 | Gynecol Obstet Invest2001，51，2： | 1 |
| 17 | Biosorption of lead (Ⅱ),cadmium (Ⅱ),copper (Ⅱ) and nickel (Ⅱ) by anaerobic granular biomass显示文摘 | Alaa H Hawari Catherine N Mulligan | 2006 | Bioresource Technology2006，97，4： | 1 |
| 18 | Intrapartum predic tion of macrosomia:accuracy of abdominal circumference esti mation显示文摘 | Alaa N Monmtaz M | 2000 | Gynecol Obstet Invest2000，51，2： | 1 |
| 19 | Intrapartum prediction of macrosomia:accuracy of abdominal circumference estimation显示文摘 | Al-inany H Alaa N Momtaz M | 2001 | Gynecol Obstet Invest2001，51，2： | 1 |
| 20 | Intrapartum prediction of macrosomia ;accuracy of abdominal circumference estimation 显示文摘 | AI - Innay H Alaa N Momtaz M | 2001 | Gynecal Obstet Invest2001，51，2： | 1 |
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