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Takahiro Utsumi,Mineo Iwatate,Wataru Sano,Hironori Sunakawa,Santa Hattori,Noriaki Hasuike,Yasushi Sano 대한소화기내시경학회 2015 Clinical Endoscopy Vol.48 No.6
Narrow-band imaging (NBI) is a new imaging technology that was developed in 2006 and has since spread worldwide. Because of its convenience, NBI has been replacing the role of chromoendoscopy. Here we review the efficacy of NBI with/without magnification for detection, characterization, and management of colorectal polyps, and future perspectives for the technology, including education. Recent studies have shown that the next-generation NBI system can detect significantly more colonic polyps than white light imaging, suggesting that NBI may become the modality of choice from the beginning of screening. The capillary pattern revealed by NBI, and the NBI International Colorectal Endoscopic classification are helpful for prediction of histology and for estimating the depth of invasion of colorectal cancer. However, NBI with magnifying colonoscopy is not superior to magnifying chromoendoscopy for estimation of invasion depth. Currently, therefore, chromoendoscopy should also be performed additionally if deep submucosal invasive cancer is suspected. If endoscopists become able to accurately estimate colorectal polyp pathology using NBI, this will allow adenomatous polyps to be resected and discarded; thus, reducing both the risk of polypectomy and costs. In order to achieve this goal, a suitable system for education and training in in vivo diagnostics will be necessary.
Fundamental Understanding of Nanoporous Carbons for Energy Application Potentials
Katsumi Kaneko,Miki Arai,Masahiro Yamamoto,Tomonori Ohba,Jun-Ichi Miyamoto,Dong-Young Kim,Yousheng Tao,Cheol-Min Yang,Kouki Urita,Toshihiko Fujimori,Hideki Tanaka,Takahiro Ohkubo,Shigenori Utsumi,Yosh 한국탄소학회 2009 Carbon Letters Vol.10 No.3
The importance of nanopore structures of carbons is shown in terms of interaction potential for various molecules including supercritical gases such as H2 and CH4. The key factors for adsorption of supercritical H2 and CH4 are shown for single wall carbon nanohorn, single wall carbon nanotube, and double wall carbon nanotube. The cluster formation of molecules is a key process for water adsorption on hydrophobic carbon nanopores. The X-ray absorption spectroscopic examination elucidates an explicit dehydration structure of ions confined in carbon nanopores.