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高磁场中乙基丙酮酸的副氢诱导极化和自旋有序转移。

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

机构信息

Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Kiel, Kiel University, Am Botanischen Garten 14, 24118, Kiel, Germany.

Otto Diels Institute for Organic Chemistry, Kiel University, Otto- Hahn Platz 4, 24118, Kiel, Germany.

出版信息

Sci Rep. 2022 Nov 12;12(1):19361. doi: 10.1038/s41598-022-22347-1.

Abstract

Nuclear magnetic resonance has experienced great advances in developing and translating hyperpolarization methods into procedures for fundamental and clinical studies. Here, we propose the use of a wide-bore NMR for 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 for homogeneous B and B magnetic fields for a three-spin system. Moreover, we estimated that the efficiency of spin order transfer is not significantly reduced when the B inhomogeneity is below ± 5%; recommendations for the sample size and RF coils are also given. With the latest breakthrough in the high-yield synthesis of 1-C-vinyl pyruvate and its deuterated isotopologues, the high-field PHIP-SAH will gain increased attention. Some remaining challenges will be addressed shortly.

摘要

磁共振在开发和将极化方法转化为基础和临床研究程序方面取得了重大进展。在这里,我们提出使用宽孔径 NMR 利用氘诱导极化进行大规模(体积和浓度)生产超极化介质。我们讨论了射频诱导氘氢自旋极化转移的好处,我们表明对于三自旋系统,对于均匀的 B 和 B 磁场,理论上预计极化度为 100%。此外,我们估计当 B 不均匀性低于±5%时,自旋极化转移的效率不会明显降低;还给出了样品尺寸和 RF 线圈的建议。随着 1-C-乙烯基丙酮酸及其氘代同位素的高产合成的最新突破,高场 PHIP-SAH 将得到更多关注。一些剩余的挑战将很快得到解决。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d7cc/9653431/50a881f12b89/41598_2022_22347_Fig1_HTML.jpg

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