期刊
MAGNETIC RESONANCE IN MEDICINE
卷 46, 期 1, 页码 1-5出版社
JOHN WILEY & SONS INC
DOI: 10.1002/mrm.1152
关键词
parahydrogen-induced polarization; diabatic; hyperpolarized C-13; angiography
High nuclear spin polarization of C-13 was reached in organic molecules. Enhancements of up to 10(4), compared to thermal polarization at 1.5 T, were achieved using the parahydrogen-induced polarization technique in combination with a field cycling method. While parahydrogen has no net polarization, it has a high spin order, which is retained when hydrogen is incorporated into another molecule by a chemical reaction. By subjecting this molecule to a sudden change of the external magnetic field, the spin order is transferred into net polarization. A C-13 angiogram of an animal was generated in less than a second. (C) 2001 Wiley-Liss, Inc.
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