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- W3121422634 abstract "Local high-accuracy velocity estimation is important for the ultrasound-based evaluation of regional myocardial function. The ultrasound phase difference at the center frequency of the transmitted signal has been conventionally used for velocity estimation. In the conventional method, spatial averaging is necessary owing to the frequency-dependent attenuation and interference of backscattered waves. Here, we propose a method for suppressing these effects using multifrequency phase differences. The resulting improvement in velocity estimation in the heart wall was validated by in vivo experiments. In the conventional method, the velocity waveform exhibits spike-like changes. The velocity waveform estimated using the proposed method did not exhibit such changes. Because the proposed method estimates myocardium velocity without spatial averaging, it can be used for measuring heart wall dynamics involving thickness changes." @default.
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- W3121422634 date "2021-04-01" @default.
- W3121422634 modified "2023-10-16" @default.
- W3121422634 title "Multifrequency Phased Tracking Method for Estimating Velocity in Heart Wall" @default.
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- W3121422634 doi "https://doi.org/10.1016/j.ultrasmedbio.2020.12.011" @default.
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