An estimation method for correction filters for wavefront aberration correction in ultrasound imaging is given. The aberration is introduced due to spatial variations of the ultrasound propagation velocity in heterogeneous tissue. The correction filters are found as eigenvectors of the cross-correlation...http://www.google.com/patents/US7273455?utm_source=gb-gplus-sharePatent US7273455 - Corrections for wavefront aberrations in ultrasound imaging
