Patent ID: 8155725

Claim:
A method for optimising the focussing of waves in a region of interest of a in a patient, with the waves being emitted by a network of N sources to the region through an aberration-inducing element that introduces an initially indeterminate phase shift φ n (1≦n≦N), with the method using M−1 successive modifications of the emitted wave, each giving rise to a perturbation, the M perturbations are measured, and these measurements are used to deduce optimal focussing characteristics, including the following steps: a) emission, via the network of N sources, of waves A n .e jα n (where j 2 =−1) presenting a spatial phase α n and amplitude A n distribution (1≦n≦N), and propagating to the region of interest in the patient, b) M−1 (M>1) modifications of the spatial phase α n and/or of amplitude distribution A n (1≦n≦N) of the waves emitted simultaneously by a plurality of sources of the network, with each modification corresponding to simultaneous modifications of the phases and/or amplitudes on this plurality of sources of the network and each modification engendering a step a) of emission, c) measurement of at least one perturbation I m (1≦m≦M) induced by the waves in the region of interest at each modification m (1≦m≦M) of the phase α n and/or amplitudes distribution A n , d) deduction, from the perturbation measurements I m , of a optimal emission phase distribution α n opt and/or an amplitude distribution A n opt maximising the perturbation I m induced in the region of interest.