Compact meta-differentiator for achieving isotropically high-contrast ultrasonic imaging.

ABSTRACT: Ultrasonic imaging is crucial in the fields of biomedical engineering for its deep penetration capabilities and non-ionizing nature. However, traditional techniques heavily rely on impedance differences within objects, resulting in poor contrast when imaging acoustically transparent targets. Here, we propose a compact spatial differentiator for underwater isotropic edge-enhanced imaging, which enhances the imaging contrast without the need for contrast agents or external physical fields. This design incorporates an amplitude meta-grating for linear transmission along the radial direction, combined with a phase meta-grating that utilizes focus and spiral phases with a first-order topological charge. Through theoretical analysis, numerical simulations, and experimental validation, we substan

SUBMITTER: Jia Y 

PROVIDER: S-EPMC10995138 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature