Pierre Hellier Pierrick Coupé Pierre Meyer Xavier Morandi D. Louis Collins Acoustic shadows detection, application to accurate reconstruction of 3D intraoperative ultrasound. 1569-1572 2008 ISBI http://dx.doi.org/10.1109/ISBI.2008.4541310 conf/isbi/2008 db/conf/isbi/isbi2008.html#HellierCMMC08