We describe a standard set of quantity names and symbols related to the estimation of kinetic parameters from dynamic contrast-enhanced T1-weighted magnetic resonance imaging data, using diffusable agents such as gadopentetate dimeglumine (Gd-DTPA). These include a) the volume transfer constant Ktrans (min-1); b) the volume of extravascular extracellular space (EES) per unit volume of tissue ve (0 < ve < 1); and c) the flux rate constant between EES and plasma kep (min-1). The rate constant is the ratio of the transfer constant to the EES (kep = Ktrans/ve). Under flow-limited conditions Ktrans equals the blood plasma flow per unit volume of tissue; under permeability-limited conditions Ktrans equals the permeability surface area product per unit volume of tissue. We relate these quantities to previously published work from our groups; our future publications will refer to these standardized terms, and we propose that these be adopted as international standards. J. Magn. Reson. Imaging 10:223-232, 1999. © 1999 Wiley-Liss, Inc.
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Paul, S. T., Gunnar, B., David, L. B., Jeffrey, L. E., Elizabeth, H., Michael, V. K., … Robert, M. W. (1999). Estimating kinetic parameters from dynamic contrast-enhanced t1-weighted MRI of a diffusable tracer: Standardized quantities and symbols. Journal of Magnetic Resonance Imaging, 10(3), 223–232. Retrieved from http://dx.doi.org/10.1002/(SICI)1522-2586(199909)10:3%3C223::AID-JMRI2%3E3.0.CO;2-S
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