Comparative study of conventional colonoscopy, magnifying chromoendoscopy, and magnifying narrow-band imaging systems in the differential diagnosis of small colonic polyps between trainee and experienced endoscopist

Abstract

Magnifying NBI and magnifying chromoendoscopy had a better interobserver agreement than conventional white-light among trainees and experienced endoscopists. The trainee needs learning time to improve diagnostic ability, even using a new modality such as magnifying NBI.

Narrow-band imaging versus I-Scan for the real-time histological prediction of diminutive colonic polyps: a prospective comparative study by using the simple unified endoscopic classification

“…Moreover, magnifying DCE requires additional costs for specialized colonoscopies and a considerable learning curve to improve the diagnostic ability for nonexperts. 25 Recently, several studies have evaluated the use of NBI without magnification in determining polyp histology for similar reasons. 6,15,16,[20][21][22] A study by Rastogi et al 15 demonstrated that the sensitivity, specificity, and accuracy of the NBI without magnification was 95%, 88%, and 92%, respectively, in 170 polyps 5 mm or smaller.…”

Computer-aided system for predicting the histology of colorectal tumors by using narrow-band imaging magnifying colonoscopy (with video)

“…With some exposure to narrow-band images, novices' diagnostic accuracy improves, but not to the level of the experienced endoscopist. 4 The recent Preservation and Incorporation of Valuable Endoscopic Innovations (PIVI) initiative of the American Society for Gastrointestinal Endoscopy addressed real-time endoscopic assessment of the histology of diminutive colorectal polyps. 5 Even with training and exposure to NBI images, there is a steep learning curve in meeting the performance thresholds recommended under the PIVI initiative.…”

Differentiating adenomas from hyperplastic colorectal polyps: narrow-band imaging can be learned in 20 minutes

“…Narrow-band imaging (NBI), with [1][2][3][4][5][6][7][8][9][10][11] and without [12][13][14][15] optical magnification, has proven accurate in differentiating adenomatous from hyperplastic colorectal polyps. NBI has the advantage of being a push-button technology that is readily accessible to Olympus colonoscope users (Olympus America, Inc, Center Valley, Penn).…”