IMPROVED IMAGING VIA HARDWARE MODIFICATION OR  IMAGE ENHANCEMENT

There are several components involved in the generation of a photoacoustic image, including a laser, an ultrasound detection unit and a data acquisition system. We have explored ways to improve the light illumination by choosing optimum wavelengths, improved the penetration of light via beam profile modification, and improved the coupling agent used between the sample and the photoacoustic probe to reduce the refractive index change. We have also developed several efficient image reconstruction algorithms to effectively utilize the generated photoacoustic signals. In addition, we studied enhancement algorithms to increase the signal-to-noise ratio of the received photoacoustic signals and consequently improve the quality of the photoacoustic images.

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