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Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging
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Manually controlled steerable needle for MRI-guided percutaneous interventions.

Kirsten R Henken1, Peter R Seevinck2, Jenny Dankelman3

  • 1TUDelft, Biomechanical Engineering, Mekelweg 2, 2628 CD, Delft, The Netherlands. K.R.Henken@TUDelft.nl.

Medical & Biological Engineering & Computing
|April 25, 2016
PubMed
Summary
This summary is machine-generated.

This study introduces a manually controlled, MRI-compatible steerable needle for percutaneous interventions. The novel device allows physicians precise control over needle path navigation, enhancing target accuracy and treatment optimization.

Keywords:
In vitroMRI compatibleMRI-guided interventionsNeedle deflectionNeedle steering

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Area of Science:

  • Medical Devices
  • Surgical Navigation
  • Interventional Radiology

Background:

  • Percutaneous interventions require precise instrument navigation.
  • Existing needles offer limited maneuverability, posing challenges for complex targeting.
  • MRI compatibility is crucial for real-time intra-procedural guidance.

Purpose of the Study:

  • To develop and evaluate a manually controlled steerable needle system.
  • To ensure MRI compatibility and visibility for enhanced navigation.
  • To assess the needle's capability for accurate intra-procedural control.

Main Methods:

  • Integration of a cable-operated compliant steering mechanism within the needle's working channel.
  • Evaluation of needle deflection at specific steering angles in gelatin and porcine liver tissue.
  • Assessment of MRI-guided needle path control in a gelatin phantom using standard MRI sequences.

Main Results:

  • The steerable needle demonstrated significant deflection (9.1-13.3 mm in gelatin, 4.6-18.9 mm in liver tissue at 60 mm depth) at a 20.3° steering angle.
  • Successful MRI-guided steering to different targets from a single entry point was achieved.
  • The system proved effective in controlling the needle path under real-time MRI visualization.

Conclusions:

  • The developed steerable needle provides physicians with enhanced flexibility and control over needle path selection.
  • MRI compatibility and steerability facilitate accurate navigation towards target positions.
  • This technology has the potential to optimize treatment strategies and improve accuracy in percutaneous interventions.