Imaging dataset acquired by PCAT

<p>The "concave" and "convex" contain 8*8 time-series signals of ultrasonic bulk wave array inspection by the 8-element PCAT with concave and convex surfaces (Figure 7c and d), respectively. The "resonance" contains frequency spectra of the ultrasonic local resonances excited by a single PCAT element with scanning lateral distance (Figure 11a). The imaging algorithms are easy to reproduce.&nbsp;Other data will be made available on request.</p>