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(a) R1ρ double dispersions measured in whole bovine blood at 7 T for various oxygen saturation levels to vary the amount of deoxyhemoglobin present. (b) The individual dispersion components are plotted from the double dispersion fits in (a). Note how the exchange component stays relatively constant, whereas the low-frequency dispersion diminishes with higher oxygen saturation. (c) The gradient parameter, estimated from the dispersion fits, decreases with oxygen saturation.
