Title :
An estimator of focal position based on geometric acoustics
Author :
Pereira, Wagner Coelho A. ; Simpson, David M. ; Machado, João C.
Author_Institution :
Biomed. Eng., Program, Federal Univ. of Rio de Janeiro, Brazil
Abstract :
A 2-D least mean square method to estimate a focus position for ultrasonic transducers is presented, together with experimental results and those of simulations performed to evaluate the technique. Computer simulation indicates that the method proposed gives reliable results in the presence of time-of-flight errors. It is also observed that the estimations become poorer as the number of receiver positions is decreased
Keywords :
focusing; least squares approximations; ultrasonic propagation; ultrasonic transducers; 2-D least mean square method; computer simulation; focal position; geometric acoustics; time-of-flight errors; ultrasonic transducers; Acoustic beams; Acoustic transducers; Biomedical acoustics; Equations; Least mean squares methods; Length measurement; Pulse measurements; Shape; Solid modeling; Ultrasonic transducers;
Conference_Titel :
Ultrasonics Symposium, 1992. Proceedings., IEEE 1992
Conference_Location :
Tucson, AZ
Print_ISBN :
0-7803-0562-0
DOI :
10.1109/ULTSYM.1992.275943
