Parallel transmit pulse design for patients with deep brain stimulation implants

Specific absorption rate (SAR) amplification around active implantable medical devices during diagnostic MRI procedures poses a potential risk for patient safety. In this study, we present a parallel transmit (pTx) strategy that can be used to safely scan patients with deep brain stimulation (DBS) implants.

[1]  Niels Kuster,et al.  The Virtual Family—development of surface-based anatomical models of two adults and two children for dosimetric simulations , 2010, Physics in medicine and biology.

[2]  W. Nitz,et al.  On the heating of linear conductive structures as guide wires and catheters in interventional MRI , 2001, Journal of magnetic resonance imaging : JMRI.

[3]  Elfar Adalsteinsson,et al.  Local SAR in parallel transmission pulse design , 2011, Magnetic resonance in medicine.

[4]  Thoralf Niendorf,et al.  Design, evaluation and application of an eight channel transmit/receive coil array for cardiac MRI at 7.0 T. , 2013, European journal of radiology.

[5]  Gabriele Eichfelder,et al.  Local specific absorption rate control for parallel transmission by virtual observation points , 2011, Magnetic resonance in medicine.

[6]  G. Metzger,et al.  Local B1+ shimming for prostate imaging with transceiver arrays at 7T based on subject‐dependent transmit phase measurements , 2008, Magnetic resonance in medicine.

[7]  Andres Hoyos Idrobo,et al.  On Variant Strategies to Solve the Magnitude Least Squares Optimization Problem in Parallel Transmission Pulse Design and Under Strict SAR and Power Constraints , 2013, IEEE Transactions on Medical Imaging.

[8]  Lawrence L. Wald,et al.  Local specific absorption rate (SAR), global SAR, transmitter power, and excitation accuracy trade‐offs in low flip‐angle parallel transmit pulse design , 2014, Magnetic resonance in medicine.

[9]  Thoralf Niendorf,et al.  Two‐Dimensional sixteen channel transmit/receive coil array for cardiac MRI at 7.0 T: Design, evaluation, and application , 2012, Journal of magnetic resonance imaging : JMRI.

[10]  P. Börnert,et al.  Transmit SENSE , 2003, Magnetic resonance in medicine.

[11]  J. M. Pauly,et al.  Controlling induced currents in guidewires using parallel transmit , 2009 .

[12]  Kawin Setsompop,et al.  Design algorithms for parallel transmission in magnetic resonance imaging , 2008 .

[13]  Ergin Atalar,et al.  of the 23 rd Annual EMBS International Conference , October 25-28 , Istanbul , Turkey RF Safety of Wires in Interventional MRI : Using a Safety Index , 2004 .

[14]  Kawin Setsompop,et al.  Slice‐selective RF pulses for in vivo B  1+ inhomogeneity mitigation at 7 tesla using parallel RF excitation with a 16‐element coil , 2008, Magnetic resonance in medicine.

[15]  Yudong Zhu,et al.  Parallel excitation with an array of transmit coils , 2004, Magnetic resonance in medicine.

[16]  J. Lagendijk,et al.  SAR and power implications of different RF shimming strategies in the pelvis for 7T MRI , 2009, Journal of magnetic resonance imaging : JMRI.

[17]  John M Pauly,et al.  Offline Impedance Measurements for Detection and Mitigation of Dangerous Implant Interactions: An RF Safety Prescreen , 2014, Magnetic resonance in medicine.

[18]  D. Sodickson,et al.  Electrodynamic constraints on homogeneity and radiofrequency power deposition in multiple coil excitations , 2009, Magnetic resonance in medicine.

[19]  Elfar Adalsteinsson,et al.  Comparison of simulated parallel transmit body arrays at 3 T using excitation uniformity, global SAR, local SAR, and power efficiency metrics , 2015, Magnetic resonance in medicine.

[20]  Niels Kuster,et al.  Evaluation of the RF heating of a generic deep brain stimulator exposed in 1.5 T magnetic resonance scanners , 2013, Bioelectromagnetics.

[21]  Jan J W Lagendijk,et al.  New method to monitor RF safety in MRI-guided interventions based on RF induced image artefacts. , 2010, Medical physics.

[22]  Jean A. Tkach,et al.  Permanent Neurological Deficit Related to Magnetic Resonance Imaging in a Patient with Implanted Deep Brain Stimulation Electrodes for Parkinson’s Disease: Case Report , 2005, Neurosurgery.

[23]  Frank G Shellock,et al.  Simple design changes to wires to substantially reduce MRI-induced heating at 1.5 T: implications for implanted leads. , 2005, Magnetic resonance imaging.

[24]  Paul A Bottomley,et al.  Designing passive MRI-safe implantable conducting leads with electrodes. , 2010, Medical physics.

[25]  Douglas C Noll,et al.  Spatial domain method for the design of RF pulses in multicoil parallel excitation , 2006, Magnetic resonance in medicine.

[26]  Yigitcan Eryaman,et al.  Reduction of implant RF heating through modification of transmit coil electric field , 2011, Magnetic resonance in medicine.

[27]  Steen Moeller,et al.  A 32‐channel lattice transmission line array for parallel transmit and receive MRI at 7 tesla , 2010, Magnetic resonance in medicine.

[28]  Esra Abaci Turk,et al.  Reduction of the radiofrequency heating of metallic devices using a dual‐drive birdcage coil , 2013, Magnetic resonance in medicine.

[29]  Olaf Dössel,et al.  Determination of Electric Conductivity and Local SAR Via B1 Mapping , 2009, IEEE Transactions on Medical Imaging.

[30]  E Atalar,et al.  A Green's function approach to local rf heating in interventional MRI. , 2001, Medical physics.

[31]  M. Ladd,et al.  Reduction of resonant RF heating in intravascular catheters using coaxial chokes , 2000, Magnetic Resonance in Medicine.