【摘 要】
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Background,Motivation and Objective Analysis of the phase difference between ultrasound signals received by pairs of transducer elements yields a robust estimate of lateral and axial displacements bet
【机 构】
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Thorax center,Erasmus MC,Rotterdam,Netherlands Th
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Background,Motivation and Objective Analysis of the phase difference between ultrasound signals received by pairs of transducer elements yields a robust estimate of lateral and axial displacements between frames [1].This technique has been used to estimate motion with submicron resolution.In this study,we apply this principle to distinguishing two closely spaced photoacoustic(PA) sources with spectral(optical) contrast.If the separation between two sources is smaller than the point spread function(PSF) width of the imaging system,they will appear as a single object at different wavelengths.The RF phase difference acquired at two spectral acquisitions provides the means to localize multiple sources below the resolution limit of the system.
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