In vivo nuclear overhauser effect in 31P‐ {1H} double‐resonance experiments in a 1.5‐T whole‐body MR system

Abstract
In 31P‐ {1H} MR experiments of humans in a 1.5‐T whole‐body system, signal intensity enhancements of 1P resonances of up to 68 ± 4% (for phosphocreatine of the calf muscle) have been observed upon irradiation at proton frequency. This observation is explained as a nuclear Overhauser effect due to the dipolar coupling between 1H and 1P spins. © 1990 Academic Press, Inc.