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In order to improve the lateral resolution and extend the image view of the previously developed 16-channel digital beamformer for a 30MHz ultrasound linear array, the design of an ultrasound imaging system with a higher frame rate and increased channel count is reported in this paper. The system is composed of 256 channels of analog front-end pulser/receiver, 64 channels of Time-Gain Compensation...
A system is composed of 64 channels of analog front-end pulser/receiver, 64 channels of Time-Gain Compensation (TGC), 64 channels of high-speed digitizer, and DSP-based beamformer implementation. The data are transferred to a PC via an Ethernet card. The system provides 64 channels of excitation pulsers while receiving simultaneously at a 120–200 MHz sampling rate at 12-bit resolution. The digitized...
A new 64 channel analog receive beamformer was developed to support a recently built 30 MHz 256-element linear array with 50 μm pitch. Each channel of the proposed beamformer consisted of a coarse delay and a fine delay circuit block. The delay blocks were implemented using wide bandwidth tapped delay lines. Multiplexers were used to select the output taps of the fine delay and coarse delay. Field...
High-frequency (HF) ultrasound imaging has been shown to be useful for non-invasively imaging anatomical structures of the eye and small animals in biological and pharmaceutical research, achieving superior spatial resolution. Cardiovascular research utilizing mice requires not only realtime B-scan imaging, but also ultrasound Doppler to evaluate both anatomy and blood flow of the mouse heart. This...
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