Reduction of magnetic resonance imaging-related heating in deep brain stimulation leads using a lead management device

Kenneth B. Baker, Jean Tkach, John D. Hall, John A. Nyenhuis, Frank G. Shellock, Ali R. Rezai

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

OBJECTIVE: To evaluate the ability of a lead management device to reduce magnetic resonance imaging (MRI)-related heating of deep brain stimulation (DBS) leads and thereby to decrease the risks of exposing patients with these implants to MRI procedures. METHODS: Experiments were performed using the Activa series (Medtronic, Inc., Minneapolis MN) DBS systems in an in vitro, gelled-saline head and torso phantom. Temperature change was recorded using fluoroptic thermometry during MRI performed using a transmit-and-recieve radiofrequency body coil at 1.5 T and a transmit-and-receive radiofrequency head coil at 3 T. A cranial model placed in the phantom was used to test a custom-designed burr hole device that permitted the placement of small-diameter, concentric loops around the burr hole at the DBS lead as it exited the cranium. RESULTS: A total of 41 scans were performed, with absolute temperature changes ranging from 0.8 to 10.3°C. Depending on the MRI system tested and the side of the phantom on which the hardware was placed, loop placement resulted in reductions in temperature rise of 41 to 74%. The effect was linearly related to the number of loops formed (P < 0.01) over the range tested (0-2.75 loops). CONCLUSION: Small, concentric loops placed around the burr hole seem to reduce MRI-related heating for these implants. Although the mechanism is still not fully understood, a device such as that used in the present study could permit a wider range of clinical scanning sequences to be used at 1.5 and 3 T in patients with DBS implants, in addition to increasing the margin of safety for the patient.

Original languageEnglish (US)
Pages (from-to)ONS-392-ONS-396
JournalNeurosurgery
Volume57
Issue number4 SUPPL.
DOIs
StatePublished - Oct 2005

Keywords

  • Deep brain stimulation
  • Magnetic resonance imaging
  • Neurostimulation
  • Parkinson's disease
  • Safety

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