Evaluation of endoscopic entire 3D image acquisition of the digestive tract using a stereo endoscope

Kayo Yoshimoto; Kenji Watabe; Tetsuji Fujinaga; Hideki Iijima; Masahiko Tsujii; Hideya Takahashi; Tetsuo Takehara; Kenji Yamada

doi:10.1117/12.2250774

14 February 2017 Evaluation of endoscopic entire 3D image acquisition of the digestive tract using a stereo endoscope

Kayo Yoshimoto, Kenji Watabe, Tetsuji Fujinaga, Hideki Iijima, Masahiko Tsujii, Hideya Takahashi, Tetsuo Takehara, Kenji Yamada

Author Affiliations +

Proceedings Volume 10054, Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XV; 1005412 (2017) https://doi.org/10.1117/12.2250774
Event: SPIE BiOS, 2017, San Francisco, California, United States

Abstract

Because the view angle of the endoscope is narrow, it is difficult to get the whole image of the digestive tract at once. If there are more than two lesions in the digestive tract, it is hard to understand the 3D positional relationship among the lesions. Virtual endoscopy using CT is a present standard method to get the whole view of the digestive tract. Because the virtual endoscopy is designed to detect the irregularity of the surface, it cannot detect lesions that lack irregularity including early cancer. In this study, we propose a method of endoscopic entire 3D image acquisition of the digestive tract using a stereo endoscope. The method is as follows: 1) capture sequential images of the digestive tract by moving the endoscope, 2) reconstruct 3D surface pattern for each frame by stereo images, 3) estimate the position of the endoscope by image analysis, 4) reconstitute the entire image of the digestive tract by combining the 3D surface pattern. To confirm the validity of this method, we experimented with a straight tube inside of which circles were allocated at equal distance of 20 mm. We captured sequential images and the reconstituted image of the tube revealed that the distance between each circle was 20.2 ± 0.3 mm (n=7). The results suggest that this method of endoscopic entire 3D image acquisition may help us understand 3D positional relationship among the lesions such as early esophageal cancer that cannot be detected by virtual endoscopy using CT.

Citation Download Citation

Kayo Yoshimoto, Kenji Watabe, Tetsuji Fujinaga, Hideki Iijima, Masahiko Tsujii, Hideya Takahashi, Tetsuo Takehara, and Kenji Yamada "Evaluation of endoscopic entire 3D image acquisition of the digestive tract using a stereo endoscope", Proc. SPIE 10054, Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XV, 1005412 (14 February 2017); https://doi.org/10.1117/12.2250774

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