Figure 3.

The flow chart of the proposed method. The beamformer computes the average power at each voxel. Local maxima of average power is then computed using a frequency-dependent power threshold, and the peaks are extracted. The Affinity Propagation algorithm is used on the resulted peaks to cluster them. A cluster tree is then built by Hierarchical clustering algorithm using Ward's measure as a distance between clusters. The cluster tree is then cut in order to get local smaller clusters of radius 1 cm for regions with normalized spatial density >20%. The normalized spatial density is computed in the mesh analysis block.