DISPLAY PIXEL BASED FOCUSING METHOD USING QUADRATURE SAMPLING IN PHOTOACOUSTIC IMAGING AND APPARETUS THEREOF

摘要

The present invention relates to a pixel unit focusing device of a photoacoustic signal which includes an orthogonal demodulation part which generates an orthogonal phase component and an in-phase component through orthogonal demodulation sampling of a received photoacoustic signal, and a beam former which beam-focuses the generated orthogonal phase component and in-phase component on each pixel point. The in-phase and orthogonal phase components are obtained by using the orthogonal demodulation sampling before the beam focusing, thereby reducing computation by the condensation on the pixel point by using each component.