An apparatus, system and method of a resonator device with an adjustable capacitor for allowing the resonance frequency (F) of the resonator device to continue to be matched to the Larmor frequency of the MRI system. The resonator device includes an inductor coil, a conductive member, a sleeve having...http://www.google.com.au/patents/US7838806?utm_source=gb-gplus-sharePatent US7838806 - Resonator with adjustable capacitor for medical device
Resonator with adjustable capacitor for medical device