QIBA test data corresponding to the Tofts model. Left: RCE values of 30 combinations of Ktrans and v
values of simulated QIBA test data without added noise. Upper-right: curve-fitting with the Tofts model over two random points of the QIBA test data without noise. Lower-right: curve-fitting of the Tofts model adding Gaussian noise of zero mean and σ=20% of the signal baseline.