Mr. Anouar M. Mekaouar Profile

Anouar M. Mekaouar

at INSA Lyon

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Proceedings Article | 13 March 2009 Paper

New vision based navigation clue for a regular colonoscope's tip

Anouar Mekaouar, Chokri Ben Amar, Tanneguy Redarce

Proceedings Volume 7261, 72611B (2009) https://doi.org/10.1117/12.811340

KEYWORDS: Colon, Visualization, Endoscopy, Head, Surgery, Image segmentation, 3D modeling, Control systems, Endoscopes, Sensors

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Regular colonoscopy has always been regarded as a complicated procedure requiring a tremendous amount of skill to be safely performed. In deed, the practitioner needs to contend with both the tortuousness of the colon and the mastering of a colonoscope. So, he has to take the visual data acquired by the scope's tip into account and rely mostly on his common sense and skill to steer it in a fashion promoting a safe insertion of the device's shaft. In that context, we do propose a new navigation clue for the tip of regular colonoscope in order to assist surgeons over a colonoscopic examination. Firstly, we consider a patch of the inner colon depicted in a regular colonoscopy frame. Then we perform a sketchy 3D reconstruction of the corresponding 2D data. Furthermore, a suggested navigation trajectory ensued on the basis of the obtained relief. The visible and invisible lumen cases are considered. Due to its low cost reckoning, such strategy would allow for the intraoperative configuration changes and thus cut back the non-rigidity effect of the colon. Besides, it would have the trend to provide a safe navigation trajectory through the whole colon, since this approach is aiming at keeping the extremity of the instrument as far as possible from the colon wall during navigation. In order to make effective the considered process, we replaced the original manual control system of a regular colonoscope by a motorized one allowing automatic pan and tilt motions of the device's tip.

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