
{"publication_number": "US-2001050558-A1", "abstract": "in nuclear magnetic resonance imaging of the human brain or the like , multiple quantum coherences , such as intermolecular double quantum coherence between water molecules , are used for soft tissue contrast . a group of pulse sequences are used in which , the standard \u03b2 = \u03c0 / 2 pulse in the original crazed sequence is replaced with a \u03c0 / 3 pulse . the maximum signal derived from idqcs is increased by a factor of 3 