Patent ID: 7777492

Claim:
A magnetic resonance compatible interventional device configured for use in a magnetic resonance device that operates with a selected resonance frequency comprising a signal generating unit arranged in a first region of the interventional device which generates a radio frequency signal at the selected resonance frequency; a capacitively coupled signal transmission line arranged between said first region and a second region of the interventional device including a plurality of alternating conductive segments and capacitors tuned to have a high impedance at the selected resonance frequency in order to suppress common mode signals, the transmission line attenuating the radio frequency signals from the signal generating unit; a high frequency power signal generating unit which generates a high frequency power signal with a frequency higher than the radiofrequency signal from the signal generating unit, the high frequency power generating unit being disposed in the second region and connected with the capacitively coupled transmission line in order to send high frequency power signals in a direction from the second region to the first region, the transmission line being tuned to have a lower impedance at the frequency of the high frequency power signal; and an amplifier disposed in the first region and connected with the signal generating unit and the capacitive coupled transmission line such that the amplifier is powered by the high frequency power signal and amplifies the radio frequency signal from the signal generating unit in order to compensate for attenuation caused by the high impedance of the capacitively coupled transmission line at the frequency of the radio frequency signal from the signal generating unit.