Application of surgical lead management and reconfigurable coil technology to reduce RF heating of DBS implants during MRI at 3T under variant body compositions

Bhumi Bhusal, Behzad Elahi, Boris Keil, Joshua Rosenow, Ehsan Kazemivalipour, Laleh Golestani Rad*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Patients with active implants such as deep brain stimulation (DBS) devices, have limited access to magnetic resonance imaging (MRI) due to risks of RF heating. With an aging population, the prevalence of neurodegenerative and vascular disease increases; and so does the indication for MRI exams in patients with such implants. In response to this growing need for MRI, many groups have investigated strategies to mitigate the RF heating of the implants. These efforts, however, have relied either on simulations with homogenous body models or simplified phantom experiments (box shaped phantom with single tissue). It is well established, however, that the shape and heterogeneity of human body affects the distribution of MRI electric fields, which by proxy, alters the RF heating of an implant inside the body. In this contribution, we applied numerical simulations and phantom experiments to examine the effectiveness of RF heating mitigation strategies under variant patient body compositions, focusing on two recently proposed techniques: (a) surgical modification of DBS lead trajectories inside the body, and (b) use of a patient-adjustable reconfigurable MRI coil, both aiming to reduce the coupling of implanted leads and MRI electric fields. Our results demonstrated that both techniques perform well under variant body compositions.

Original languageEnglish (US)
JournalUnknown Journal
DOIs
StatePublished - Jun 25 2020

Keywords

  • Body model
  • Finite element
  • Implant safety
  • Magnetic resonance imaging (MRI)
  • RF heating
  • Simulation
  • Specific absorption rate (SAR)
  • Transmit coil

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • Immunology and Microbiology(all)
  • Neuroscience(all)
  • Pharmacology, Toxicology and Pharmaceutics(all)

Fingerprint Dive into the research topics of 'Application of surgical lead management and reconfigurable coil technology to reduce RF heating of DBS implants during MRI at 3T under variant body compositions'. Together they form a unique fingerprint.

Cite this