scholarly journals RF heating of deep brain stimulation implants in open‐bore vertical MRI systems: A simulation study with realistic device configurations

2019 ◽  
Vol 83 (6) ◽  
pp. 2284-2292 ◽  
Author(s):  
Laleh Golestanirad ◽  
Ehsan Kazemivalipour ◽  
David Lampman ◽  
Hideta Habara ◽  
Ergin Atalar ◽  
...  
Keyword(s):  
Deep Brain Stimulation ◽  
Brain Stimulation ◽  
Simulation Study ◽  
Rf Heating ◽  
Deep Brain

scholarly journals Reconfigurable MRI coil technology can substantially reduce RF heating at the tips of bilateral deep brain stimulation implants

2018 ◽  
Author(s):  
Laleh Golestanirad ◽  
Boris Keil ◽  
Sean Downs ◽  
John Kirsch ◽  
Behzad Elahi ◽  
...  
Keyword(s):  
Deep Brain Stimulation ◽  
Brain Stimulation ◽  
Temperature Rise ◽  
Substantial Reduction ◽  
The Body ◽  
Rf Heating ◽  
Coil System ◽  
Body Coil ◽  
Magnetic Resonance Imaging Mri ◽  
Deep Brain

AbstractPatients with deep brain stimulation (DBS) implants can significantly benefit from magnetic resonance imaging (MRI) examination, however, access to MRI is restricted in this patients because of safety concerns due to RF heating of the leads. Recently we introduced a patient-adjustable reconfigurable MRI coil system to reduce the SAR at the tip of deep brain stimulation implants during MRI at 1.5T. A simulation study with realistic models of single (unilateral) DBS leads demonstrated a substantial reduction in the local SAR up to 500-fold could be achieved using the coil system compared to quadrature birdcage coils. Many patients however, have bilateral DBS implants and the question arises whether the rotating coil system can be used in for them. This work reports the results of phantom experiments measuring the temperature rise at the tips of bilateral DBS implants with realistic trajectories extracted from postoperative CT images of 10 patients (20 leads in total). A total of 200 measurements were performed to record temperature rise at the tips of the leads during 2 minutes of scanning with the coil rotated to cover all accessible rotation angles. In all patients, we were able to find an optimum coil rotation angle and reduced the heating of both left and right leads to a level below the heating produced by the body coil. An average heat reduction of 65% was achieved for bilateral leads. Reconfigurable coil technology introduces a promising approach for imaging of patients with DBS implants.

scholarly journals Investigation into Deep Brain Stimulation Lead Designs: A Patient-Specific Simulation Study

2016 ◽  
Vol 6 (3) ◽  
pp. 39 ◽  
Author(s):  
Fabiola Alonso ◽  
Malcolm Latorre ◽  
Nathanael Göransson ◽  
Peter Zsigmond ◽  
Karin Wårdell
Keyword(s):  
Deep Brain Stimulation ◽  
Brain Stimulation ◽  
Simulation Study ◽  
Patient Specific ◽  
Deep Brain

scholarly journals Local SAR near deep brain stimulation (DBS) electrodes at 64 and 127 MHz: A simulation study of the effect of extracranial loops

2016 ◽  
Vol 78 (4) ◽  
pp. 1558-1565 ◽  
Author(s):  
Laleh Golestanirad ◽  
Leonardo M. Angelone ◽  
Maria Ida Iacono ◽  
Husam Katnani ◽  
Lawrence L. Wald ◽  
...  
Keyword(s):  
Deep Brain Stimulation ◽  
Brain Stimulation ◽  
Simulation Study ◽  
Local Sar ◽  
Deep Brain

scholarly journals Electric Field Comparison between Microelectrode Recording and Deep Brain Stimulation Systems—A Simulation Study

2018 ◽  
Vol 8 (2) ◽  
pp. 28 ◽  
Author(s):  
Fabiola Alonso ◽  
Dorian Vogel ◽  
Johannes Johansson ◽  
Karin Wårdell ◽  
Simone Hemm
Keyword(s):  
Deep Brain Stimulation ◽  
Electric Field ◽  
Brain Stimulation ◽  
Simulation Study ◽  
Microelectrode Recording ◽  
Deep Brain
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