Improvements in ultrasound elastography using dynamic focusing

Many ultrasound elastograms are reconstructed from pre- and post-compression radiofrequency (RF) signals after beamforming using a single or a few focusing depths. This might limit the accuracy of the displacement estimates for elastography in the area far from the focusing depths. This article studies the improvement of the elastograms reconstructed from the signals beamformed using a dynamic focusing scheme compared with a single focusing scheme. The results show that the elastograms reconstructed using the signals from the dynamic focusing scheme have higher signal-to-noise ratio (SNR_e) and contrast-to-noise ratio (CNR_e) than those from the single focusing scheme.