Method and apparatus for 'thick-slice' 3-dimensional ultrasound imaging utilizing a multi-zone, multi-frequency ultrasound image reconstruction scheme with sub-zone blending

Abstract

Methods and systems of ultrasonic imaging multiple depth zones. One method includes imaging a first zone using multi-angle plane wave imaging, imaging a second zone using tissue harmonic imaging, and forming a 3D image based on the received signals from the first zone and the second zone. The imaging for each zone is 'thick slice' imaging, generating multiple slices through the imaged medium. Multiple frequencies can also be used. The depth of each zone can vary based on the ultrasonic array, and correspondingly, the F# used for imaging the zone. In an example, zones can be imaged at different F#'s, for example, at F#1 for the first zone, at F#2, F#3, or F#6 for one or more zones that extend deeper into the object than the first zone. Such methods can include blending the transitions between the first and the second zone, and/or generating interpolated frames between directly imaged frames.