Figure 3From: Robustness to noise of arterial blood flow estimation methods in CT perfusionExample of behaviour of the algorithms developed for implementation of slope method. Behaviour of the algorithms developed for implementation of SM. Estimated regression lines are shown superimposed on a simulated noisy Cl curve (the same reported in Figure 2). From the top: a) semiautomatic algorithm, black stars represent start and end points selected from the operator; b) automatic algorithm; c) automatic algorithm after smoothing. In b and c the black stars represent the point automatically recognised from the algorithm as sample at maximum slope. In this case, computed BFa were respectively: 68.55, 78.30 and 123.81 ml/min/100 ml.Back to article page