Abstract
Background
To overcome the field of view and ergonomic limitations of standard laparoscopes, we are developing a multi-resolution foveated laparoscope that can simultaneously obtain both wide- and zoomed-in-view images through a single scope. To facilitate the effective access to the dual views of images with different resolution and field coverage acquired by our laparoscope, six different display modes have been developed. Each of the six display modes has inherent advantages and disadvantages. This study compares the six display modes through a human-subject experiment, which was conducted with an emulated laparoscope using a 4K camera.
Methods
Twenty-four subjects without medicine background performed three evaluation trials of a touching task with each of the display modes. Various objective measurements including task completion time, the number of collisions, gaze position, and tooltip position, and subjective preference for the display modes were recorded.
Results
For all the measurements except for task completion time and moving speed of tooltip, there were statistically significant differences among the display modes. Although the focus plus warped context view mode was selected as one of the least preferred modes, it showed the best task performance.
Conclusions
The unblocked wide context view was useful to provide a situational awareness even when it was severely distorted in some of the display modes, and information continuity played an important role in improving task performance. Moreover, the position change of viewing window coupled to the location of region of interest helped improve task performance, by providing an additional cue for spatial awareness.
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Acknowledgements
This work was supported by National Institutes of Health (NIH) Grant Award 1R01EB18921-01.
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Dr. Hong Hua has a patent Multi-Resolution Foveated Endoscope/Laparoscope (pending) and a patent Optical Article and Illumination System for Endoscope (pending), and has no other related conflicts of interest or financial ties to disclose. Drs. Sangyoon Lee, Mike Nguyen, and Allan J. Hamilton have no conflicts of interest or financial ties to disclose.
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Lee, S., Hua, H., Nguyen, M. et al. Comparison of six display modes for a multi-resolution foveated laparoscope. Surg Endosc 33, 341–351 (2019). https://doi.org/10.1007/s00464-018-6445-0
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DOI: https://doi.org/10.1007/s00464-018-6445-0