Parahydrogen-induced polarization and spin order transfer in ethyl pyruvate at high magnetic fields

Abstract Nuclear magnetic resonance has experienced great advances with the development and translation of hyperpolarization methods into routine procedures for fundamental and clinical studies. Here, we propose the use of a wide bore NMR for the large-scale (volume- and concentration-wise) production of hyperpolarized media using parahydrogen-induced polarization. We discuss the benefits of radio frequency-induced parahydrogen spin order transfer, we show that 100% polarization is theoretically expected in homogeneous B0 and B1 magnetic fields for a three-spin system. Moreover, we estimated that the efficiency of spin order transfer is not significantly reduced when the B1 inhomogeneity is below ±5%; recommendations for the sample size and RF coils are also given. With the latest breakthrough in high yield synthesis of 1-13C-vinyl pyruvate and its deuterated isotopologues, the high-field PHIP-SAH will gain increased attention. Some remaining challenges will be addressed shortly.