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Related Experiment Videos

Superconducting open-configuration MR imaging system for image-guided therapy

J F Schenck1, F A Jolesz, P B Roemer

  • 1General Electric Corporate Research and Development Center, General Electric Co, Schenectady, NY 12309, USA.

Radiology
|June 1, 1995
PubMed
Summary

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This study developed an open-configuration superconducting magnetic resonance (MR) imager for interactive interventional procedures. The new MR system offers direct patient access and near real-time imaging capabilities.

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Interventional Radiology

Background:

  • Traditional magnetic resonance (MR) imaging systems can limit patient access, hindering interventional procedures.
  • Developing advanced MR imaging technologies is crucial for improving minimally invasive treatments.

Purpose of the Study:

  • To create a superconducting MR imager with direct patient access.
  • To enable interactive MR-guided interventional procedures.

Main Methods:

  • Designed and constructed a 0.5-T superconducting magnet with a vertical access region.
  • Integrated shielded gradient coils, flexible surface coils, nonmagnetic displays, and tracking instrumentation.
  • Utilized fast gradient-recalled echo sequences for near real-time imaging.

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Main Results:

  • Achieved magnet homogeneity of 12.3 ppm and gradient linearity within 1% over a 30 cm diameter region.
  • Demonstrated a 10% higher signal-to-noise ratio compared to a standard 0.5-T imager.
  • Showcased interactive image plane selection and near real-time imaging at 1.5 seconds per image.

Conclusions:

  • Open-configuration superconducting MR magnets facilitate MR-guided interventional procedures with full patient access.
  • Near real-time imaging and interactive control are key for successful interventions.
  • This technology advances the capabilities of interventional radiology.