MRI intervention

MRI Conditional Actively-Tracked Metallic Electrophysiology Catheters and Guidewires with Miniature Tethered Radio-Frequency Traps: Theory, Design and Validation

Author(s): Akbar Alipour, Eric S. Meyer, Charles Dumoulin, Ronald Watkins, Hassan Elahi, Wolfgang Loew, Jeffrey Schweitzer, Gregory Olson, Yue Chen, Susumu Tau, Michael Guttman, Aravindan Kolandaivelu, Henry Halperin, Ehud Schmidt
MRI Conditional Actively-Tracked Metallic Electrophysiology Catheters and Guidewires with Miniature Tethered Radio-Frequency Traps: Theory, Design and Validation 500 371 IEEE Transactions on Biomedical Engineering (TBME)
Cardiovascular interventional devices typically have long metallic braids or backbones to aid in steerability and pushability. However, electromagnetic coupling of metallic-based cardiovascular interventional devices with the radiofrequency (RF) fields present during Magnetic Resonance Imaging (MRI) can make a device unsafe for use in an MRI scanner. We aimed to develop MRI conditional actively-tracked cardiovascular interventional devices by sufficiently attenuating induced currents on the metallic braid/tube and internal-cabling using miniaturized resonant floating RF traps (MBaluns). We provided electromagnetic simulation revealing MBalun critical dimensions, along with phantom heating and swine experiments that validate the designs. read more