Skip to main content
. Author manuscript; available in PMC: 2021 Aug 19.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2014 Oct;61(10):1668–1687. doi: 10.1109/TUFFC.2014.006466

Figure 1.

Figure 1.

Unfiltered microbubble amplitude spectra when transmitting a single-cycle pulse at 4 MHz and receiving with a center frequency of 20 MHz (59% bandwidth) with separate, confocal piston transducers indicated the presence of a broadband signal content from the first few harmonics (5–12 MHz, upwardly biased by the bandwidth of the receiving transducer), as well as broadband signal content at higher harmonics (15–25 MHz).