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Optical imaging technology in colonoscopy:Is there a role for photometric stereo?

World Journal of Gastrointestinal Endoscopy 2020年第5期12卷 138-148页

作者： Benjamin M Shandro khemraj emrith Gregory Slabaugh Andrew Poullis Melvyn L Smith Department of Gastroenterology St George's University Hospitals NHS Foundation TrustLondon SW170QTUnited Kingdom Centre for Machine Vision University of the West of EnglandBristol BS161QYUnited Kingdom Department of Computer Science CityUniversity of LondonLondon EC1V 0HBUnited Kingdom

Colonoscopy screening for the detection and removal of colonic adenomas is central to efforts to reduce the morbidity and mortality of colorectal ***,up to a third of adenomas may be missed at colonoscopy,and the majority of post-colonoscopy colorectal cancers are thought to arise from *** have three-dimensional surface topographic features that differentiate them from adjacent normal ***,these topographic features are not enhanced by white light colonoscopy,and the endoscopist must infer these from two-dimensional *** may contribute to the number of missed lesions.A variety of optical imaging technologies have been developed commercially to enhance surface ***,existing techniques enhance surface topography indirectly,and in two dimensions,and the evidence does not wholly support their use in routine clinical *** this narrative review,co-authored by gastroenterologists and engineers,we summarise the evidence for the impact of established optical imaging technologies on adenoma detection rate,and review the development of photometric stereo(PS)for *** is a machine vision technique able to capture a dense array of surface normals to render three-dimensional reconstructions of surface *** imaging technique has several potential clinical applications in colonoscopy,including adenoma detection,polyp classification,and facilitating polypectomy,an inherently three-dimensional ***,the development of PS for colonoscopy is at an early *** consider the progress that has been made with PS to date and identify the obstacles that need to be overcome prior to clinical application.

关键词： Photometric stereo Colonoscopy Colonic polyps Adenomas Image enhancement Machine vision

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