Analysis of Large Bowel Peristalsis with Video Capsule Endoscopy
Irritable Bowel Syndrome(IBS) is suggested to be diagnosed with evaluating large bowel peristalsis. Video Capsule Endoscopy(VCE) enables a clinician to observe natural peristalsis of the gastrointestinal tract. In our pilot study, about 80％ of PillCamTM SB(Given Imaging Ltd., Yoqneam, Israel) capsule endoscopes (CEs) which were originally designed for viewing the small intestine reached cecum and transmitted images of large bowel until 8 hours of their battery lifetimes are over. Large bowel peristalsis can be observed as a series of VCEs images by the clinician taking over an hour to analyse. In this paper we present analysing methods of large bowel peristalsis with VCE, which make clinicians be able to diagnose peristaltic activity and patterns at a glance. We count pixels in low brightness areas of each VCE images to analyse peristaltic activity. The low brightness areas which are distant from CEs white-light-LEDs spread with circular muscle layers of large bowel(CM) being relaxed. We estimate peristaltic patterns by the distance between the center of the image and the closest pixel of the low brightness areas. Normal peristalsis caused by normal contraction of CM make the CE point towards longitudinal direction of the intestinal tract. By applying these methods to both a control group of 9 healthy volunteers(GOH) and a group of 5 IBS patients(GOI), we present experimental results that demonstrate the effectiveness of these methods.
Makoto Yagihashi Yasumasa Niwa Masanao Nakamura Hidemi Goto Hideo Fujimoto
Omohi College, Graduate School of Engineering,Nagoya Institute of Technology, Gokiso-cho,Showa-ku,Na Department of gastroenterology, Nagoya University Graduate School of Medicine, 65 Tsuruma-cho, Showa
国际会议
北京
英文
770-773
2007-05-23（万方平台首次上网日期，不代表论文的发表时间）