Estimation of spatial resolution for high-frequency imaging systems using a novel anechoic-sphere phantom. Filoux, Erwan ; Mamou, Jonathan ; Aristizábal, Orlando ; Ketterling, Jeffrey A. Abstract Publication: Acoustical Society of America Journal Pub Date: 2010 DOI: 10.1121/1.3507983 Bibcode: 2010ASAJ..128.2280F