As a new nondestructive biophotonic technology,taking the ultrasonic wave as the media,optoacoustic tomography is a kind of imaging method based on the differences of optical absorption within the biological organization. With an analysis on the loss of the high-frequency information containing image details resulted from the decay of the evanescent wave in the traditional acoustic lens in the current opto-acoustic tomography system,a study is conducted by using the lens with negative refractive index to ma...
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