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. Author manuscript; available in PMC: 2013 Mar 6.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2011 Dec;58(12):2620–2630. doi: 10.1109/TUFFC.2011.2125

Fig. 8.

Fig. 8

The results of phantom studies. Wire-target images using (a) 40-MHz two-cycle sine burst and (b) 1-µs windowed chirp sweeping from 20 to 60 MHz. The axial brightness profile of the wire-target image using (c) 40-MHz two-cycle sine burst and (d) 1-µs windowed chirp sweeping from 20 to 60 MHz. 300-µm sphere phantom images using (e) 40-MHz two-cycle sine burst and (f) 2-µs windowed chirp sweeping from 20 to 60 MHz. 800-µm sphere phantom images using (g) 40-MHz two-cycle sine burst and (h) 2-µs windowed chirp sweeping from 20 to 60 MHz. The images are acquired using a type-2 transducer. (i) eSNR profiles in depth. The dashed line was acquired from coded excitation and the solid line was acquired from a two-cycle sine burst.