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Abstract #4328

Remote Detection of Implanted Neurostimulator in MRI Scanner

Pallab K. Bhattacharyya1, Erik B. Beall1, Michael D. Phillips1, Mark J. Lowe1

1Cleveland Clinic, Cleveland, OH, United States

Deep brain stimulation (DBS) using implants is an effective symptomatic treatment of conditions like Parkinson’s disease, major depression and tremor. Functional MRI (fMRI) scans have the potential to decode the underlying mechanisms of the efficacy of DBS, and are usually performed with externalized neurostimulators. In order to perform fMRI scans with implanted neurostimulators, it is essential to monitor the ON/OFF state of the device. Using an AM receiver circuit to pick up an external RF signal from the stimulator when it is active, we have developed a prototype of a device to monitor the state of implanted neurostimulators at 3T.

Keywords

acquisition activation active amplitude antenna appearance audience audio baker battery bold brain brief capacitively circuit clearly clinic coil comprised conditions conducting connected control controlled converter copper coupled decode deep depression detect detection developed device devices disease display done drift effective efficacy enameled ending energy enough ensure equipment essential exam extension external externalized feedback fields filter filtered frequency fringe functional generator harmonics health heating identifiable identified immersed implant implanted implants inaccurate incorporates induced inside institutes intervals just known leads like linear located loop made magnet major manner mark mechanisms medium mode model models monitor monitoring must national newer noise older output outside panel pass passed patch peak periods phantom physicists pick plot plotted post potential powered presence programmed prototype pulse radio receiver recording relating remains remote researchers rest room scanner sensitivity spectrum started status stimulation stretch sufficient switch symptomatic system systems target timing touching treatment tremor trigger underlying usually variability variable wire