Enhancement of Solution NMR and MRI with Laser-Polarized Xenon

American Association for the Advancement of Science (AAAS) - Tập 271 Số 5257 - Trang 1848-1851 - 1996
Gil Navon1, Yi‐Qiao Song1, T. Rõõm1, Stephan Appelt1, R. E. Taylor1, Alexander Pines1
1Materials Sciences Division, Lawrence Berkeley National Laboratory and Department of Chemistry, University of California, Berkeley, CA 94720, USA

Tóm tắt

Optical pumping with laser light can be used to polarize the nuclear spins of gaseous xenon-129. When hyperpolarized xenon-129 is dissolved in liquids, a time-dependent departure of the proton spin polarization from its thermal equilibrium is observed. The variation of the magnetization is an unexpected manifestation of the nuclear Overhauser effect, a consequence of cross-relaxation between the spins of solution protons and dissolved xenon-129. Time-resolved magnetic resonance images of both nuclei in solution show that the proton magnetization is selectively perturbed in regions containing spin-polarized xenon-129. This effect could find use in nuclear magnetic resonance spectroscopy of surfaces and proteins and in magnetic resonance imaging.

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Tài liệu tham khảo

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American Association for the Advancement of Science (AAAS)

Tập 271 Số 5257

1848-1851

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