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Photoacoustic Imaging

Photoacoustic imaging involves both photonics and acoustics, the principle of it is to use short pulsed laser light illuminates object, the energy can be absorbed by the absorber. The energy deposition can be converted to thermoelastic expansion and creating a pressure wave, the pressure wave is detected by an ultrasound transducer. The PAI has more advantages such as: break through optical diffusion limit, multi-scale high-resolution imaging of biological structures, rich optical contrasts, images optical absorption with 100 % sensitivity, no leakage of excitation photons into detectors and etc.

In vivo Small Animal Tumor Imaging

Fully 3-D Photoacoustic Imaging

In addition to the PAI system, it also developed a photoacoustic microscopy (PAM) system for microscopy applications. Instead of using an optical parametric oscillator (OPO), use a Nd:YAG laser for excitation. Microscope objectives are used to condense the beam for optical resolution operation. In collaboration with the industry, we also explore the applicability of novel acoustic detectors in the field of photoacosutics.

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