A nuclear magnetic resonance apparatus incorporating a first trans-receiver coil, an internal lock coil, a decoupling coil, means for tuning said coils to desired frequencies, a first trans-receiving system for supplying the first trans-receiver coil with a first nuclear (such as .sup.1 H) resonance...http://www.google.fr/patents/US4051429?utm_source=gb-gplus-shareBrevet US4051429 - Nuclear magnetic resonance apparatus
