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Vision based motion tracking of surgical instruments in 3D space

AI Lund lunch seminar 6 October 2021

Title: Vision based motion tracking of surgical instruments in 3D space

Speaker: Maj Stenmark, Computer Science and Region Skåne

When: 6 October at 12.00-13.15

Where: Online


Motion tracking during live surgeries may be used to assess surgeons’ intra-operative performance, provide feedback, and predict outcome. Current assessment protocols rely on human observations, controlled laboratory settings, or tracking technologies not suitable for live operating theatres. In this study, a novel method for motion tracking of live open-heart surgery was developed and evaluated.

In order to track and record the motion of the instruments we used a 3D-printed ‘tracking dies’ with miniature markers were fitted to DeBakey forceps. The surgical field was recorded with a video camera mounted above the operating table. Software was developed for tracking the die from the recordings. The system was tested on five open-heart procedures. Surgeons were asked to report subjective system related concerns during live surgery and assess the weight of the die on a blind test. The accuracy of the system was evaluated against ground truth data generated by a robot.

The vision-based motion tracking system was applicable for live surgeries with negligible inconvenience to the surgeons. Motion data was extracted with acceptable accuracy and speed at low computational cost.