Journal
IEEE TRANSACTIONS ON HAPTICS
Volume 13, Issue 1, Pages 159-166Publisher
IEEE COMPUTER SOC
DOI: 10.1109/TOH.2020.2967375
Keywords
Haptic transparency; hydrostatic transmission; MRI-compatible; medical device; needle biopsy; telemanipulation
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Funding
- NSF CHS [1615891]
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Limited physical access to target organs of patients inside an MRI scanner is a major obstruction to real-time MRI-guided interventions. Traditional teleoperation technologies are incompatible with the MRI environment and although several solutions have been explored, a versatile system that provides high-fidelity haptic feedback and access deep inside the bore remains a challenge. We present a passive and nearly frictionless MRI-compatible hydraulic teleoperator designed for in-bore liver biopsies. We describe the design components, characterize the system transparency, and evaluate the performance with a user study in a laboratory and a clinical setting. The results demonstrate < 5% difference between input and output forces during realistic manipulation. A user study with participants conducting mock needle biopsy tasks indicates that a remote operator performs equally well when using the device as when holding a biopsy needle directly in hand. Additionally, MRI compatibility tests show no reduction in signal-to-noise ratio in the presence of the device.
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