Capon Beamforming Applied to Second-Harmonic Ultrasound Experimental Data

This paper presents the novelty of adaptive Capon beamforming on received experimental second-harmonic pulse-echo ultrasound imaging channel-data. IQ channel datasets were collected when imaging a tissue-mimicking phantom: two with the transmit frequency 1.7 MHz and the receive band-pass filters centered around 1.7 and 3.4 MHz respectively, as well as one with both the transmit and receive center frequencies being 3.4 MHz. Images are displayed and analyzed for all datasets both using Capon and conventional delay-and-sum beamforming. This work proves the feasibility of Capon beamforming applied to tissue-harmonic imaging.