Patent ID: 6888348

Claim:
A pulse sequence method for discriminating between decoupled spectral entities in I-S heteronuclei and spin decoupling spectral artifact, comprising the steps of: (a) at time t=0, exciting I spins by application of a 90Â° resonant pulse at phase Ï†, (b) upon a delay of substantially Î”/2, applying a Ï€ x s pulse to S spins at phase x with respect to Ï†, (c) upon a further delay of substantially Î”/2, applying a Ï€ x 1 pulse to said I spins at phase x with respect to Ï† and at the conclusion of said Ï€ x 1 pulse, (d) directing decoupling radiation to said S spins and concurrently acquiring a time dependent waveform f(t 2 ), and (e) at the conclusion of said acquisition, terminating said decoupling radiation, wherein Î”=Î´+t 1 and Î´ is substantially equal to the duration of said Ï€ x s pulse.