  Purpose: To harmonize the use of color for MR relaxometry maps and therefore
recommend the use of specific color-maps for representing T1 and T2 maps.
Methods: Perceptually linearized color-maps were chosen to have similar color
settings as those proposed by Griswold et al. in 2018. A Delphi process,
polling the opinion of a panel of 81 experts, was used to generate consensus on
the suitability of these maps. Results: Consensus was reached on the
suitability of the logarithm-processed Lipari color-map for T1 and the
logarithm-processed Navia color-map for T2. There was consensus on color bars
being mandatory and on the use of a specific value indicating invalidity. There
was no consensus on whether the ranges should be fixed per anatomy. Conclusion:
The authors recommend the use of the logarithm-processed Lipari color map for
displaying quantitative T1 maps and R1 maps; likewise, the authors recommend
the logarithm-processed Navia color-map for displaying T2, T2*, R2 and R2*
maps.
