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A Prototype Body-Mounted MRI-Compatible Robot for Needle Guidance in Shoulder Arthrography.

R Monfaredi1, R Seifabadi2, I Iordachita3

  • 1Sheikh Zayed Institute for Pediatric Surgical Innovation, Children's National Medical Center, 111 Michigan Ave. DC 20010 USA; Industrial Department, Azad University Sough Tehran Branch, Tehran, Iran.

Proceedings of the ... IEEE/RAS-EMBS International Conference on Biomedical Robotics and Biomechatronics. IEEE/RAS-EMBS International Conference on Biomedical Robotics and Biomechatronics
|December 5, 2014
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Summary

A new MRI-compatible robot aids accurate needle placement for shoulder arthrography. This streamlines the procedure into a single MRI suite step, improving efficiency and accuracy.

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Area of Science:

  • Medical Robotics
  • Diagnostic Imaging
  • Interventional Procedures

Background:

  • Traditional shoulder arthrography involves a two-stage process using fluoroscopy and MRI.
  • This workflow can be complex and time-consuming, requiring patient transfer between imaging modalities.
  • There is a need for streamlined, accurate needle placement techniques within the MRI suite.

Purpose of the Study:

  • To design and evaluate a novel, compact, and lightweight patient-mounted robot for MRI-guided needle placement.
  • To enable MRI-guided shoulder arthrography as a single-stage procedure within the MRI suite.
  • To assess the robot's mechanical design, MRI compatibility, and impact on image quality.

Main Methods:

  • A 4-DOF robot was designed with criteria including rigidity, MRI compatibility, and sterilizability.
  • The robot facilitates needle orientation and positioning for interventions.
  • Initial experiments were conducted to evaluate MRI compatibility with the robot on a human volunteer.

Main Results:

  • The robot is compact, lightweight, and MRI-compatible.
  • Initial tests showed minimal artifacts in the region of interest.
  • Shoulder MRI images were not adversely affected by the presence of the robot on a volunteer.

Conclusions:

  • The designed robot enables accurate, MRI-guided needle placement for shoulder arthrography.
  • The robot streamlines the procedure into a single-stage workflow within the MRI suite.
  • This novel robotic system has the potential to improve the efficiency and accuracy of interventional MRI procedures.