Fig. 1.

Schematic and photograph of LED-based photoacoustic system. A) Schematic of the PAI system using LED array light source. B) Photograph of PLED-PAI probe associated with motorized stage. C) Whole imaging setup includes PC and processing unit, data acquisition, LED driver, ultrasound transducer, LED light source, and motorized stage. D) PLED-PAI probe with imaging plane and illumination source are shown schematically. LED array design is also shown in the inset—there were alternating rows of LEDs with different wavelengths.