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Magnetic resonance imaging of hyperpolarized 129Xe produced by spin exchange with diode-laser pumped Cs

1998; American Institute of Physics; Volume: 73; Issue: 18 Linguagem: Inglês

10.1063/1.122547

1520-8842

D. Levron, D. K. Walter, Stephan Appelt, Richard J. Fitzgerald, D. Kahn, Stephen E. Korbly, Karen L. Sauer, W. Happer, T. Earles, L. J. Mawst, D. Botez, M. Harvey, Louis A. DiMarco, J.C. Connolly, Harald E. Möller, X. J. Chen, Gary P. Cofer, G. Allan Johnson,

Advanced NMR Techniques and Applications

We report the results of experiments leading to the production of an image of a polarized Xe129 sample prepared by spin exchange with Cs, optically pumped with a spectrally narrowed 894.3 nm diode laser. Representative images of the average electron spin polarization are shown. Appreciable cesium electron polarization values were achieved, and a nuclear polarization of about 2.5% was measured for Xe129 The absolute nuclear polarization was measured by water-calibrated free induction decay of the nuclear magnetic resonance signal, and the polarized xenon imaged using a 2 T magnetic resonance imaging system.