Coefficient of variation (CV) of the intra- and inter-day variance of SNR (A) and sodium concentrations (B) for each magnet-sequence combination, measured in 4 regions in the cartilage. Each CV is the square root of the variance expressed as a percentage of the overall mean SNR or sodium concentration for the relevant magnet-sequence combination. Abbreviations: IRW=IR WURST, R3D=Radial 3D, PAT=Patellar, MED=FT Medial, LAT= FT Lateral, CON=PF Condyle, with PF=Posterior Femoral, FT=Femoro-Tibial.