Figure 1
From: Super-resolution photoacoustic and ultrasound imaging with sparse arrays
Experimental setup. Samples carrying 5 parallel microchannels are placed perpendicularly to the imaging plane. Each channel is 40 μm wide and 50 μm deep, the center-to-center interchannel distance being Lcc = 125 μm. In the PA experiment, the sample is illuminated by a laser pulse and the resulting PA signals are detected by a linear US probe. In the US experiment, a plane wave is emitted in the sample direction and the backscattered signals are collected. The purple arrows indicate the propagation direction of the ultrasound plane wave.
