Abstract
Purpose
Trans-oral robotic surgery (TORS) using the da Vinci surgical robot is a new minimally-invasive surgery method to treat oropharyngeal tumors, but it is a challenging operation. Augmented reality (AR) based on intra-operative ultrasound (US) has the potential to enhance the visualization of the anatomy and cancerous tumors to provide additional tools for decision-making in surgery.
Methods
We propose a US-guided AR system for TORS, with the transducer placed on the neck for a transcervical view. Firstly, we perform a novel MRI-to-transcervical 3D US registration study, comprising (i) preoperative MRI to preoperative US registration, and (ii) preoperative to intraoperative US registration to account for tissue deformation due to retraction. Secondly, we develop a US-robot calibration method with an optical tracker and demonstrate its use in an AR system that displays anatomy models in the surgeon’s console in real-time.
Results
Our AR system achieves a projection error from the US to the stereo cameras of 27.14 and 26.03 pixels (image is 540\(\times \)960) in a water bath experiment. The average target registration error (TRE) for MRI to 3D US is 8.90 mm for the 3D US transducer and 5.85 mm for freehand 3D US, and the TRE for pre-intra operative US registration is 7.90 mm.
Conclusion
We demonstrate the feasibility of each component of the first complete pipeline for MRI-US-robot-patient registration for a proof-of-concept transcervical US-guided AR system for TORS. Our results show that trans-cervical 3D US is a promising technique for TORS image guidance.
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Notes
We interpolate each centerline into 1000 points and report the average distance between the corresponding points.
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Acknowledgements
We thank the financial support from Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Grant and the Charles Laszlo Chair in Biomedical Engineering held by Dr. Salcudean. We thank David Black, Nicholas Rangga, and Angela Li for their help in CAD.
Funding
Natural Sciences and Engineering Research Council of Canada Discovery Grant and Charles Laszlo Chair in Biomedical Engineering held by Dr. Salcudean.
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Chen, W., Kalia, M., Zeng, Q. et al. Towards transcervical ultrasound image guidance for transoral robotic surgery. Int J CARS 18, 1061–1068 (2023). https://doi.org/10.1007/s11548-023-02898-y
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DOI: https://doi.org/10.1007/s11548-023-02898-y