Skip to main content
. Author manuscript; available in PMC: 2009 Oct 5.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2008 Mar;55(3):602–618. doi: 10.1109/TUFFC.2008.685

Fig. 6.

Fig. 6

The simulated two-way elevation beams of the tapered lens at 0.7-mm thickness (top row) and the full round lens at 1.22-mm thickness (bottom row) with lens materials of six different speeds (columns) at 7.25 MHz and 5% fractional bandwidth transmission signals. All beam plots are normalized at every depth, and plot dimensions are 10 mm in elevation, and 1.5 to 37.5 mm in depth (relative to the array top surface under the lens) with the white at −6 dB and gray at −12 dB beam contours. Both the tapered and the full round lens speeds are in meters per second and relative to a tissue medium speed. The relative speeds for tapered lens are: (a) −500, (b) −300, (c) −100, (d) 0, (e) +300, and (f) +500; and for the round lens: (g) −300, (h) −200, (i) −100, (j) 0, (k) +100, and (l) +200.