DYNAMIC RECEIVE BEAMFORMER WITH OVERSAMPLING FOR MEDICAL DIAGNOSTIC ULTRASOUND

摘要

Receive beamformers (10) for receive beamforming ultrasound information include a plurality of channels. The received signals for each channel are oversampled (72) for conversion to digital form, such as sampling with a sigma-delta converter (14). The reconstruction of the samples into data at the Nyquist or other rate is performed in stages (18, 26). Partial reconstruction (76) to a rate less than the oversampling rate, but greater than the Nyquist rate, occurs prior to summation (80) across channels. Delays (74) are implemented by selecting data from the sample stream. After summation (80), the samples are reconstructed (82) at a Nyquist or other rate.