Abstract
Purpose
Annotation of surgical activities becomes increasingly important for many recent applications such as surgical workflow analysis, surgical situation awareness, and the design of the operating room of the future, especially to train machine learning methods in order to develop intelligent assistance. Currently, annotation is mostly performed by observers with medical background and is incredibly costly and time-consuming, creating a major bottleneck for the above-mentioned technologies. In this paper, we propose a way to eliminate, or at least limit, the human intervention in the annotation process.
Methods
Meaningful information about interaction between objects is inherently available in virtual reality environments. We propose a strategy to convert automatically this information into annotations in order to provide as output individual surgical process models.
Validation
We implemented our approach through a peg-transfer task simulator and compared it to manual annotations. To assess the impact of our contribution, we studied both intra- and inter-observer variability.
Results and conclusion
In average, manual annotations took more than 12 min for 1 min of video to achieve low-level physical activity annotation, whereas automatic annotation is achieved in less than a second for the same video period. We also demonstrated that manual annotation introduced mistakes as well as intra- and inter-observer variability that our method is able to suppress due to the high precision and reproducibility.
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Acknowledgements
This work was funded by ImPACT Program of Council for Science, Technology and Innovation, Cabinet Office, Government of Japan. Authors thanks the IRT b\(<>\)com for the provision of the software “Surgery Workflow Toolbox [annotated]”, used for this work. Authors especially thank Ms. M. Le Duff, Mr. A. Derathé, Mr. T. Dognon, Mr. E. Maguet and Mr. B. Ndack for their help to the data annotation.
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Huaulmé, A., Despinoy, F., Perez, S.A.H. et al. Automatic annotation of surgical activities using virtual reality environments. Int J CARS 14, 1663–1671 (2019). https://doi.org/10.1007/s11548-019-02008-x
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DOI: https://doi.org/10.1007/s11548-019-02008-x