Application for PatentofRICHARD R. ERNSTforGYROMAGNETIC RESONANCE SPECTROSCOPY EMPLOYING SPIN ECHOSPIN SPIN DECOUPLING AND TWO-DIMENSIONAL SPREADINGABSTRACT OF THE DISCLOSUREA method of gyromagnetic resonance spectroscopy is disclosedwhich simplifies the resultant spectra by eliminating spin-spin coupling effects. The method is particularly useful foreliminating homonuclear spin-spin coupling effects. In themethod, spin echo resonance of the resonators is obtained andthe time elapsing between tipping of the resonators anddetection of the resultant echo t1 is changed from one measure-ment to the next. The resultant echos are measured at equalintervals of time t2. Echo resonance data is Fourier trans-formed from the time domain into the frequency domain toobtain spectral data in-the frequency domain as a function oft1. A second Fourier transform of the resonance data is theneffected to transform the spectral data into data which is afunction of both .omega.1 and .omega.2 where .omega.1 and .omega.2 are each related to? and ? respectively. The spectral data in the .omega.1 - .omega.2plane is then projected at 45° to the .omega.2 and .omega.1 axes to derivespectral data free of spin-spin coupling effects. The datamay also be projected perpendicular to and onto the .omega.1 axisto obtain a J coupling spectrum.-1-
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