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Imaging of speed of sound holds great promise for medical detection and diagnosis since it is a quantitative, physical property of tissues not imaged by other means. The full Waveform Inversion (FWI) based method can build speed of sound images with high spatial resolution but it is computationally very demanding. The iterative Algebraic Reconstruction Technique (ART) is a favored choice for fast...
Imaging of speed of sound (SOS) holds great promise for medical detection and diagnosis, since it is a quantitative, physical property of tissues not imaged by other means. The full Waveform Inversion (FWI) based method can build speed of sound images with high spatial resolution but it is computationally demanding. The iterative Algebraic Reconstruction Technique (ART) is a favored choice for fast...
Photoacoustic tomography (PAT) of biological tissue offers potential advantages in distinguishing different structures according to their chemical composition. However, as medical photoacoustic (PA) signals are broad band, which usually cover a 0.2–50 MHz range, current band-limited ultrasound transducers can only receive and present a limited fraction of that range. Besides, the received PA signals...
ΣΔ beamforming is a promising technique for small analog front-end (AFE) of the medical ultrasound imaging system. Nonetheless, the high data rate from the ΣΔ modulator in the AFE and the high-Q reconstruction filter put harsh requirements on the digital beamforming circuits. Although the BScan-sample-based ΣΔ beamformer structure with FIR reconstruction filter reduces the speed requirement on multipliers...
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