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Proceedings Paper

Evaluation of the three-dimensional endoscope system for assessing the gastrointestinal motility
Author(s): Kayo Yoshimoto; Kenji Yamada; Kenji Watabe; Maki Takeda; Takahiro Nishimura; Michiko Kido; Toshiaki Nagakura; Hideya Takahashi; Tsutomu Nishida; Hideki Iijima; Masahiko Tsujii; Tetsuo Takehara; Yuko Ohno
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Paper Abstract

This paper described evaluation of the three-dimensional endoscope system for assessing the gastrointestinal motility. Gastrointestinal diseases are mainly based on the morphological or anatomical abnormity. However, sometimes the gastrointestinal symptoms are apparent without visible abnormalities. Such diseases are called functional gastrointestinal disorder, for example, functional dyspepsia, and irritable bowel syndrome. One of the major factors of these diseases is the gastrointestinal dysmotility. Assessment procedures for motor function are either invasive, or indirect. We thus propose a three-dimensional endoscope system for assessing the gastrointestinal motility. To assess the dynamic motility of the stomach, three-dimensional endoscopic imaging of stomach lining is performed. Propagating contraction waves are detected by subtracting estimated stomach geometry without contraction waves from one with contraction waves. After detecting constriction waves, their frequency, amplitude, and speed of propagation can be calculated. In this study, we evaluate the proposed system. First, we evaluate the developed three-dimensional endoscope system by a flat plane. This system can measure the geometry of the flat plane with an error of less than 10 percent of the distance between endoscope tip and the object. Then we confirm the validity of a prototype system by a wave simulated model. The detected wave is approximated by a Gaussian function. In the experiment, the amplitude and position of the wave can be measure with 1 mm accuracy. These results suggest that the proposed system can measure the speed and amplitude of contraction. In the future, we evaluate the proposed system in vivo experiments.

Paper Details

Date Published: 27 February 2014
PDF: 6 pages
Proc. SPIE 8935, Advanced Biomedical and Clinical Diagnostic Systems XII, 89351G (27 February 2014); doi: 10.1117/12.2041652
Show Author Affiliations
Kayo Yoshimoto, Osaka Univ. (Japan)
Kenji Yamada, Osaka Univ. (Japan)
Kenji Watabe, Osaka Univ. (Japan)
Maki Takeda, Osaka Univ. (Japan)
Takahiro Nishimura, Osaka Univ. (Japan)
Michiko Kido, Osaka Univ. (Japan)
Toshiaki Nagakura, Osaka Electro-Communication Univ. (Japan)
Hideya Takahashi, Osaka City Univ. (Japan)
Tsutomu Nishida, Osaka Univ. (Japan)
Hideki Iijima, Osaka Univ. (Japan)
Masahiko Tsujii, Osaka Univ. (Japan)
Tetsuo Takehara, Osaka Univ. (Japan)
Yuko Ohno, Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 8935:
Advanced Biomedical and Clinical Diagnostic Systems XII
Tuan Vo-Dinh; Anita Mahadevan-Jansen; Warren S. Grundfest M.D., Editor(s)

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