Fig. 3

Correlation plots A and C and Bland–Altman plots B and D comparing the 1TCM and ARG methods in lower legs A and B and feet C and D. The blue numbers represent participant identification. The analysis includes perfusion values from all participants, both the left and right leg and foot (n = 80). The correlation plots compare the K₁ values estimated from the methods and include coefficient of determination (r²) and the linear equation. The dashed lines represent the lines of identity, while the solid lines represent the linear fit. The Bland–Altman plots display the mean difference between the K₁ measurements from the ARG and 1TCM method, with the dashed lines representing the 95% upper and lower limits of agreement