Patent ID: 6027447
Filing Date: 2000-02-22
Classification: G01S

Abstract:
A method of generating high resolution ultrasound images comprising: obtaining signals from a plurality of transmitter-receiving elements, wherein the plurality of transmitter-receiver elements produces transmitted signals in response to receiving transmission signals, whereby echo signals are produced when a target located in a near-field of the transmitter-receiver elements reflects the transmitted signals, and receiving the echo signals and generating the received signals therefrom;dynamically correcting the received signals for near field effect;cross-correlating the corrected received signals at a predetermined depth and window length, thereby producing cross-correlation signals;measuring phase differences between said received signals from peak positions of the cross-correlation signals;deriving phase aberration values for each element by solving linear equations based on the measured phase differences;correcting the received signal based on the derived phase aberration values and producing an image from the received signals; anditeratively adjusting undetermined linear terms in the linear equations for optimal performance of said method.