New diagnostic method based on color imaging using endoscopic spectroscopy system (ESS) for colorectal neoplasms

Sano, Yasushi; Kato, Shigeharu; Kobayashi, Masahiko; Fu, Kuang I.; Yoshino, Takayuki; Yoshida, Shigeaki; Fujii, Takeshi; Sambongi, Masao; Igarashi, Makoto; Obi, Takashi; Yamaguchi, Masahiro; Ohyama, Nagaaki

doi:10.1016/s0016-5085(00)83147-9

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“…NBI is another diagnostic method that was recently introduced into clinical practice for both upper and lower endoscopy 30 . This technology is based on narrowing the bandwidth of spectral transmittance of the optical lters used in the frame sequential image method for creating endoscopy images 6 .…”

Section: Evaluation Of Publication Biasmentioning

confidence: 99%

A Comparison of Magnifying Chromoendoscopy Versus Narrow Band Imaging in the Diagnosis of Depth of Invasion for Early Colorectal Cancers

Kobayashi

Kudo

Miyachi

et al. 2011

Showa Univ J Med Sci

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: Although chromoendoscopy and narrow band imaging NBI are widely used in diagnosing the invasion depth of colorectal cancers, comparative studies of these modalities are lacking. This meta-analysis compared the performance of these two modalities in colorectal cancer diagnosis. MEDLINE, EMBASE, and Cochrane Library were searched for relevant original articles published up to December 20 th , 2010. Major criteria for article inclusion were : i magnifying chromoendoscopy or NBI was used as a diagnostic modality and pit pattern or vascular pattern was used as a diagnostic classi cation ; ii sensitivity and speci city were reported ; iii absolute numbers of true-positive, false-positive, true-negative, and false-negative cases, or their equivalent, were provided ; and iv pathology of biopsy, endoscopy, or surgical treatment was used as the reference standard. Sensitivity and speci city were pooled using a random effects model. Regression analysis was performed to compare the discriminatory power between chromoendoscopy and NBI by including a dummy variable. We made the assumption that a positive regression coef cient implied a better discriminatory power for NBI, and vice versa. Of 1846 screened articles, 16 ful lled all inclusion criteria. Pooled sensitivity for chromoendoscopy and NBI was 0.85 95 CI : 0.82-0.87 and 0.80 0.76-0.85 , respectively, and specificity was 0.98 0.97-0.99 and 0.98 0.97-0.99 , respectively. The regression coef cient for chromoendoscopy versus NBI was 0.02 95 CI : 1.18-1.71 . These results indicate that chromoendoscopy and NBI may have similar power for the diagnostic assessment of colonic neoplasms. However, other factors such as convenience, time, and cost still must be taken into account in making the nal diagnostic choice.

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Section: Evaluation Of Publication Biasmentioning

confidence: 99%