A multiply-tuned probe for magnetic resonance imaging or spectroscopy in which a driving inductor is separately coupled to two or more trap inductors. The impedance match at each frequency is adjusted independently of the impedance match at the other frequencies and independent of the tuning by using...http://www.google.com/patents/US5243289?utm_source=gb-gplus-sharePatent US5243289 - Multiply-tuned probe for magnetic resonance imaging or spectroscopy
