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The new application of ultrasonic imaging to transient elastography has triggered the emergence of high frame-rate imaging. Using plane wave excitation (PWE), a single insonification is sufficient to form an image; thus PWE is one of the methods for achieving high frame-rate imaging. However, due to the lack of transmit focusing, the signal-to-noise-ratio (SNR), contrast, and spatial resolution of...
In this paper, we investigate the impact of a receiver amplifier on orthogonal frequency division multiplexing (OFDM) and single-carrier block transmission (SCBT) systems which are two potential air interfaces for future short-range wireless communications at 60GHz radio spectrum. We derive a generalized baseband equivalent model for the receiver amplifier by using a power series to capture the nonlinear...
Recently, a wide spectrum of new applications in biomedical ultrasound such as real time 3D ultrasound and transient elastography has triggered the need of high frame-rate imaging. One of the methods to achieve high frame-rate imaging is to use plane wave excitation (PWE) with which a single insonification is sufficient to form an image. However, due to the lack of transmit focusing, the signal-to-noise-ratio...
Sidelobe contribution from off-axis scatterers degrades image quality in ultrasound imaging. Focusing errors resulting from sound-velocity inhomogeneities in tissues, also known as phase aberrations, reduce coherence of the received signals and thus elevates the sidelobe level degrading the contrast resolution. In this study, we proposed a novel adaptive sidelobe-reduction technique using aperture...
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