title: Correction of diffraction errors in attenuation estimation with Dynamic Beam Translation.
abstract: We describe computer simulations for the estimation of the attenuation coefficient in scattering media using the Dynamic Beam Translation (DBT) method. DBT refocuses a variable aperture transducer to maintain the focal characteristics of the transducer at different depths in order to reduce diffraction errors. The efficacy of DBT is evaluated for transducers with different focal powers and under the influence of phase aberration due to the body wall. DBT shows robustness in the elimination of diffraction errors and resistance to the effects of aberration.
authors.affiliation: Department of Radiology, University of Texas Medical School, Houston 77030.
authors.forename: I
authors.initials: I
authors.lastname: Céspedes
authors.forename: J
authors.initials: J
authors.lastname: Ophir
mesh_terms: D003198:Computer Simulation; D006801:Humans; D007091:Image Processing, Computer-Assisted; D014159:Transducers; D014463:Ultrasonography / Q000379:methods*