Color-map recommendation for MR relaxometry maps
Miha Fuderer (University Medical Center Utrecht)
Barbara Wichtmann (Bonn University Hospital)
Fabio Crameri (Undertone.design)
Nandita M. de Souza (The Institute of Cancer Research and The Royal Marsden NHS Foundation Trust)
Bettina Baeßler (Universitätsklinikum Würzburg)
Vikas Gulani (University of Michigan)
Meiyun Wang (Henan Academy of Sciences, Zhengzhou University)
Dirk Poot (Erasmus MC)
Sebastian Weingärtner (TU Delft - ImPhys/Weingärtner group, TU Delft - ImPhys/Computational Imaging)
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Abstract
Purpose
To harmonize the use of color for MR relaxometry maps and therefore recommend the use of specific color-maps for representing T1, T2, and T2* maps and their inverses.
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 and 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.
This work originated with the Quantitative MR Study Group of the International Society of Magnetic Resonance in Medicine (ISMRM); it has the approval of the Publication Committee and of the Board of the ISMRM.
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