Development and testing of an endoscopic pseudo-viewpoint alternating system

Y. Koreeda, S. Obata, Y. Nishio, Satoshi Miura, Y. Kobayashi, K. Kawamura, R. Souzaki, S. Ieiri, M. Hashizume, M. G. Fujie

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    6 Citations (Scopus)

    Abstract

    Purpose:    An endoscopic system is needed that presents informative images irrespective of the surgical situation and the number of degrees of freedom in endoscopic manipulation. This goal may be achieved with a virtual reality view for a region of interest from an arbitrary viewpoint. An endoscopic pseudo-viewpoint alternation system for this purpose was developed and tested. Method:    Surgical experts and trainees from an endoscopic surgery training course at the minimally invasive surgery training center of Kyushu University were enrolled in a trial of a virtual reality system. The initial viewpoint was positioned to approximate the horizontal view often seen in laparoscopic surgery, with <sup>20∘</sup> between the optical axis of the endoscope and the task surface. A right-to-left suturing task with right hand, based on a task from the endoscopic surgery training course, was selected for testing. We compared task outcomes with and without use of a new virtual reality-viewing system.Result:    There was a 0.37 mm reduction in total error (p=0.02) with use of the proposed system. Error reduction was composed of 0.1 mm reduction on the y-axis and 0.27 mm reduction on the x-axis. Experts benefited more than novices from use of the proposed system. Most subjects worked at a pseudo-viewpoint of around 34<sup>∘</sup>.Discussion:    Suturing performance improved with the new virtual reality endoscopic display system. Viewpoint alternation resulted in an overview that improved depth perception and allowed subjects to better aim the marker. This suggests the proposed method offers users better visualization and control in endoscopic surgery.

    Original languageEnglish
    Pages (from-to)619-628
    Number of pages10
    JournalInternational journal of computer assisted radiology and surgery
    Volume10
    Issue number5
    DOIs
    Publication statusPublished - 2015 May 1

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    Keywords

    • Depth perception
    • Endoscope
    • Image processing
    • Minimally invasive surgery
    • Virtual reality

    ASJC Scopus subject areas

    • Radiology Nuclear Medicine and imaging
    • Health Informatics
    • Surgery

    Cite this

    Koreeda, Y., Obata, S., Nishio, Y., Miura, S., Kobayashi, Y., Kawamura, K., Souzaki, R., Ieiri, S., Hashizume, M., & Fujie, M. G. (2015). Development and testing of an endoscopic pseudo-viewpoint alternating system. International journal of computer assisted radiology and surgery, 10(5), 619-628. https://doi.org/10.1007/s11548-014-1083-z