Network representation of the whole data-set before clustering superimposed to the mean registered image.

<p>The nodes are located in the center of gravity of the tumors and bigger nodes have bigger network centrality (<i>i.e</i>. they are strongly connected to many other nodes). The edges colors and strength represent the distance between nodes (from red and thick (short distance) to blue and thin). For visibility reasons, arcs corresponding to a distance greater than 35 are not displayed.</p>