4 March 2016 Evaluation of motion compensation method for assessing the gastrointestinal motility using three dimensional endoscope
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Abstract
Functional gastrointestinal disorders (FGID) are the most common gastrointestinal disorders. The term ”functional” is generally applied to disorders where there are no structural abnormalities. Gastrointestinal dysmotility is one of the several mechanisms that have been proposed for the pathogenesis of FGID and is usually examined by manometry, a pressure test. There have been no attempts to examine the gastrointestinal dysmotility by endoscopy. We have proposed an imaging system for the assessment of gastric motility using a three-dimensional endoscope. After we newly developed a threedimensional endoscope and constructed a wave simulated model, we established a method of extracting three-dimensional contraction waves derived from a three-dimensional profile of the wave simulated model obtained with the endoscope. In the study, the endoscope and the wave simulated model were fixed to the ground. However, in a clinical setting, it is hard for endoscopists to keep the endoscope still. Moreover, stomach moves under the influence of breathing. Thus, three-dimensional registration of the position between the endoscope and the gastric wall is necessary for the accurate assessment of gastrointestinal motility. In this paper, we propose a motion compensation method using three-dimensional scene flow. The scene flow of the feature point calculated by obtained images in a time series enables the three-dimensional registration of the position between the endoscope and the gastric wall. We confirmed the validity of a proposed method first by a known-movement object and then by a wave simulated model.
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Kayo Yoshimoto, Kayo Yoshimoto, Kenji Yamada, Kenji Yamada, Kenji Watabe, Kenji Watabe, Tetsuji Fujinaga, Tetsuji Fujinaga, Michiko Kido, Michiko Kido, Toshiaki Nagakura, Toshiaki Nagakura, Hideya Takahashi, Hideya Takahashi, Hideki Iijima, Hideki Iijima, Masahiko Tsujii, Masahiko Tsujii, Tetsuo Takehara, Tetsuo Takehara, Yuko Ohno, Yuko Ohno, } "Evaluation of motion compensation method for assessing the gastrointestinal motility using three dimensional endoscope", Proc. SPIE 9698, Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XIV, 969819 (4 March 2016); doi: 10.1117/12.2214423; https://doi.org/10.1117/12.2214423
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