The results are then analyzed using percolation models. The percolation cluster geometry is depicted using the wash-in component of the MRI contrast signal intensity.
Fractal characteristics are determined for each two-dimensional cluster.
The invasion percolation model is used to describe the evolution of the tumor perfusion front. It is concluded that the blood perfusion in a 2D tumor vessel network has a fractal structure and that the evolution of the perfusion front can be characterized using invasion percolation.