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Annals of Biomedical Engineering

, Volume 47, Issue 11, pp 2322–2333 | Cite as

Closed Loop Control of an MR-Conditional Robot with Wireless Tracking Coil Feedback

  • Yue ChenEmail author
  • Joseph Howard
  • Isuru Godage
  • Saikat Sengupta
Article
  • 121 Downloads

Abstract

This paper presents a hardware and software system to implement the task space control of an MR-conditional robot by integrating inductively coupled wireless coil based tracking feedback into the control loop. The main motivation of this work is to increase the accuracy performance and address the system uncertainties in the practical scenarios. We present the MR-conditional robot hardware design, wireless tracking method, and custom-designed communication software for real-time tracking data transfer. Based on these working principles, we fabricate the robot platform and evaluate the complete system with respect to various performance indices, i.e. data communication speed, targeting accuracy, tracking coil resolution, image quality, temperature variation, and task space control accuracy for static and dynamic targeting inside MRI scanner. The in-scanner targeting results show that the MR-conditional robot with wireless tracking coil feedback achieves the targeting error of 0.17 ± 0.08 mm, while the error calculated from the joint space optical encoder feedback is 0.68 ± 0.19 mm.

Keywords

MR-conditional robot Wireless tracking Robot control 

Notes

Acknowledgments

The authors would like to acknowledge Eric Barth, Robert Webster, and Edward B Welch for their support.

Conflict of interest

All authors declared that they have no conflict of interest.

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Copyright information

© Biomedical Engineering Society 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringUniversity of ArkansasFayettevilleUSA
  2. 2.Department of Mechanical EngineeringVanderbilt UniversityNashvilleUSA
  3. 3.School of ComputingDePaul UniversityChicagoUSA
  4. 4.Department of RadiologyVanderbilt University Medical CenterNashvilleUSA

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