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Tissue harmonic imaging provides better spatial resolution by producing the image with the second harmonic component generated by nonlinear propagation in tissue. However, the spectral overlap between the transmitted signal and received second harmonic signal results in image artifacts and reduces the image quality. Conventional filtering techniques such as a bandpass filter can separate the second...
In ultrasound harmonic imaging with chirp coded excitation, the axial resolution can be improved by increasing the excitation signal bandwidth. However, increasing the bandwidth will cause overlapping between the received nonlinear second harmonic chirp component (SHCC) and the fundamental component. For the spectrally overlapping harmonics, signal decoding using the second harmonic matched filter...
Superharmonic imaging (SHI) provides improved spatial resolution and contrast detection with low reverberation artifacts by combining the third, fourth and fifth harmonics of the nonlinear received signal. The aim of this study is to increase the signal-to-noise ratio (SNR) with improved axial resolution and reduced ripple artifacts in the SHI using chirp coded excitation. Experiments are performed...
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