[Digital interpolation beamformer in medical ultrasound imaging]
Shu-Li Shu1, Wen-Wen Tang, Liang Wang
1School of Information Science and Engineering, Southeast University, Nanjing 210096.
Abstract:
A digital beamformer in medical ultrasound imaging systems conventionally requires that the returning signals received by transducers are sampled at a rate significantly higher than the Nyquist rate. This paper presents a digital beamformer that employs zero padding followed by digital interpolation filtering to achieve vernier beamformer delays. The experimental results show that the digital interpolation beamformer can greatly decrease the complexity of A/D converter circuitry.
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