Figure 5

Beamforming performance of different image types with the target placed at the geometric focus. (a) Target and peak pressure (shown with darker and lighter colors, respectively) when operating the transducer at 20 W of electrical power. (b) Target and peak intensity normalized to the hydrophone method. (c) Focal spot positioning error. (d) Focal spot volume. (e) Dice similarity coefficient. Standard deviation bars are shown.