MRI of the lung using hyperpolarized He-3 at very low magnetic field (3 mT)

Details MRI of the lung using hyperpolarized He-3 at very low magnetic field (3 mT) MRI of the lung using hyperpolarized He-3 at very low magnetic field (3 mT)

2004-01-26

arxiv.org/abs/physics/0401130v1

Physics

Medical Physics

10 pages, 3 figures. Presented at 11th ISMRM meeting, Toronto 2003; to be published in Magnetic Resonance Materials in Physics

Scientific paper

Optical pumping of He-3 produces large (hyper) nuclear-spin polarizations independent of the magnetic resonance imaging (MRI) field strength. This allows lung MRI to be performed at reduced fields with many associated benefits, such as lower tissue susceptibility gradients and decreased power absorption rates. Here we present results of 2D imaging as well as accurate 1D gas diffusion mapping of the human lung using He-3 at very low field (3 mT). Furthermore, measurements of transverse relaxation in zero applied gradient are shown to accurately track pulmonary oxygen partial pressure, opening the way for novel imaging sequences.

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