Fig. 6: Edge detection of artificial biological models.
From: Compact meta-differentiator for achieving isotropically high-contrast ultrasonic imaging
a An artificial mini hand with the forefinger stretched out, along with the simulated acoustic intensity profile at the output plane. b Photograph of the mini hand with the same material and parameters as in (a), and the measured intensity profile at the output plane. c Intensity profiles along the horizontal direction of the simulated and measured results in (a) and (b). d–f Same as (a–c), but for the artificial mini hand with both the forefinger and midfinger stretched out. g Photograph of a silicone urethral catheter, and the corresponding measured intensity profile at the output plane. h Photograph of the silicone urethral catheter with a small metallic ball inserted inside, and the measured intensity profile at the output plane. i Intensity profiles along the horizontal direction of the measured results in (g) and (h). j Photograph of an artificial blood vessel, and the measured intensity profile at the output plane. k Photograph of the artificial blood vessel with a large blood clot inside, and the measured intensity profile at the output plane. l Intensity profiles along the horizontal direction of the measured results in (j) and (k).
