title: High-speed ultrasound volumetric imaging system. I. Transducer design and beam steering.
abstract: Transducer design and phased array beam steering are developed for a volumetric ultrasound scanner that enables the 3-D visualization of dynamic structures in real time. The authors describe the design considerations and preliminary evaluation of a high-speed, online volumetric ultrasound imaging system that uses the principles of pulse-echo, phased array scanning with a 2-D array transducer. Several 2-D array designs are analyzed for resolution and main lobe-side lobe ratio by simulation using 2-D fast Fourier transform methods. Fabrication techniques are described for 2-D array transducer. Experimental measurements of pulse-echo point spread responses for 2-D arrays agree with the simulations. Measurements of pulse-echo sensitivity, bandwidth, and crosstalk are included.
authors.affiliation: US Food and Drug Adm., Rockville, MD.
authors.forename: S W
authors.initials: SW
authors.lastname: Smith
authors.forename: H R
authors.initials: HR
authors.lastname: Pavy
authors.forename: O T
authors.initials: OT
authors.lastname: von Ramm