Frequency-Dependent F-Number Increases the Contrast and the Spatial Resolution in Fast Pulse-Echo Ultrasound Imaging

@article{Schiffner2021FrequencyDependentFI,
  title={Frequency-Dependent F-Number Increases the Contrast and the Spatial Resolution in Fast Pulse-Echo Ultrasound Imaging},
  author={Martin F. Schiffner and Georg Schmitz},
  journal={2021 IEEE International Ultrasonics Symposium (IUS)},
  year={2021},
  pages={1-4}
}
Fixed F-numbers reduce grating lobe artifacts in fast pulse-echo ultrasound imaging. Such F-numbers result in dynamic receive subapertures whose widths vary with the focal position. These subapertures, however, ignore useful low-frequency components in the excluded radio frequency (RF) signals and, thus, reduce the lateral resolution. Here, we propose a frequency-dependent F-number to simultaneously suppress grating lobe artifacts and maintain the lateral resolution. This F-number, at high… 

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