Abstract
By varying slice-selective gradients in successive data acquisitions, the first in vitro measurements of molecular self-diffusion coefficients were performed in a magnetic resonance imager at 0.35 Tesla. Reasonably accurate measurements were found by the MRI method in comparison with 2.3 T NMR spectrometer measurements on the same samples, and in comparison to reported literature values. Thus, in addition to T1, T2, mobile proton density, flow velocity, magnetic susceptibility, and chemical shift, molecular self-diffusion coefficients are now added to the list of biophysical parameters measurable by magnetic resonance imaging in the noninvasive characterization of biological systems.
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