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[Safety aspects in interventional MRI].

Arnulf Oppelt1, Ioannis Delakis

  • 1Siemens Medical Solutions, Erlangen.

Zeitschrift Fur Medizinische Physik
|May 11, 2002
PubMed
Summary
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Magnetic Resonance Imaging (MRI) enhances minimally invasive surgeries. However, intravascular procedures require careful consideration of MR compatibility and potential risks like burning lesions due to resonant currents.

Area of Science:

  • Medical Imaging
  • Neurosurgery
  • Interventional Radiology

Context:

  • Magnetic Resonance Imaging (MRI) offers superior soft-tissue contrast, driving its increased use in guiding minimally invasive and neurological surgical procedures.
  • Emerging intravascular interventional MRI applications involve introducing guidewires, catheters, and coils into blood vessels.
  • Standard MRI precautions must be augmented with specific attention to MR compatibility, accurate localization of tools, and geometrical distortions.

Purpose:

  • To highlight the growing application of interventional MRI in surgical guidance.
  • To identify critical safety considerations for intravascular interventional MRI procedures.
  • To address the potential risks associated with electrical phenomena in interventional MRI.

Summary:

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  • Interventional Magnetic Resonance Imaging (iMRI) is increasingly utilized for surgical guidance due to its excellent soft-tissue contrast.
  • New intravascular procedures using iMRI necessitate careful evaluation of device compatibility, precise tool localization, and potential geometrical distortions.
  • High electric fields and resonant currents at conductor ends in intravascular iMRI pose a risk of thermal injury (burning lesions).

Impact:

  • Enhances the safety and efficacy of minimally invasive and neurological surgeries guided by MRI.
  • Informs the development of safer interventional tools and protocols for intravascular MRI procedures.
  • Contributes to a better understanding of the physics and potential hazards of interventional MRI, particularly in vascular applications.