Tank filters placed in series with the lead wires or circuits of active medical devices to enhance mri compatibility

An implantable medical therapeutic or diagnostic device, comprising:

• an active medical device including electronic circuitry for therapy delivery or detection of biological signals;
• a lead in electrical communication with the active medical device electronic circuitry;
• an electrode assembly electrically connected to the lead;
• and
• a tank filter associated with the lead and having an inductor in parallel with a capacitor, wherein the configuration or composition of the capacitor's electrode plates are adjusted to raise the equivalent series resistance of the capacitor such that the tank filter has an overall circuit Q to attenuate current flow over a range of selected frequencies.

An implantable medical therapeutic or diagnostic device, comprising:

• an implantable active medical device including electronic circuitry for therapy delivery or detection of biological signals;
• a lead in electrical communication with the active medical device electronic circuitry;
• an electrode assembly electrically connected to the lead;
• and
• a tank filter associated with the lead and having an inductor in parallel with a capacitor, wherein the configuration or composition of the capacitor's electrode plates are adjusted to raise the equivalent series resistance of the capacitor such that the tank filter has an overall circuit Q resulting in a three dB bandwidth on the order of MHz to attenuate current flow over a range of selected MRI RF pulsed frequencies.