MRI compatibility and visibility assessment of implantable medical devices

Beth A. Schueler, Todd B. Parrish, Jyh Cherng Lin, Bruce E. Hammer, Brian J. Pangrle, E. Russell Ritenour, John Kucharczyk, Charles L. Truwit

Research output: Contribution to journalArticlepeer-review

72 Scopus citations

Abstract

We have developed a protocol to evaluate the magnetic resonance (MR) compatibility of implantable medical devices. The testing protocol consists of the evaluation of magnetic field-induced movement, electric current, heating, image distortion, and device operation. In addition, current induction is evaluated with a finite element analysis simulation technique that models the effect of radiofrequency fields on each device. The protocol has been applied to several implantable infusion pumps and neurostimulators with associated attachments. Experiments were performed using a 1.5-T whole- body MR system with parameters selected to approximate the intended clinical and worst case configuration. The devices exhibited moderate magnetic field- induced deflection and torque but had significant image artifacts. No heating was detected for any of the devices. Pump operation was halted in the magnetic field, but resumed after removed. Exposure to the magnetic field activated some of the neurostimulators.

Original languageEnglish (US)
Pages (from-to)596-603
Number of pages8
JournalJournal of Magnetic Resonance Imaging
Volume9
Issue number4
DOIs
StatePublished - Apr 1 1999

Keywords

  • Artifacts
  • Implantable devices
  • Implantable pulse generator
  • Infusion pump
  • Neurostimulator
  • Safety

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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