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- W2145614873 abstract "In this letter, we demonstrate the feasibility of 3-D photoacoustic imaging using a monolithic CMOS micromachined capacitive ultrasonic sensor. The sensing membranes are released by a post-CMOS metal etch and sealed by silicon dioxide. Nine membranes, each with an inner diameter of 60 μm, form a single detection unit with a capacitance value of 292.5 fF. A 6- μm carbon fiber was employed to evaluate the 3-D photoacoustic imaging capability and resolution of our sensor. A 2-D large-aperture array was emulated by 2-D mechanical scanning of a single sensing element with a scanning step of 120 μm. A 2-D synthetic aperture focusing technique was used for image reconstruction. The measured -6-dB spatial resolutions were 181 μm in axial and 448 μm in lateral, respectively, at the depth of ~ 2.4 cm. The 3-D photoacoustic image of a carbon fiber phantom was successfully produced." @default.
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- W2145614873 date "2011-08-01" @default.
- W2145614873 modified "2023-10-06" @default.
- W2145614873 title "Three-Dimensional Photoacoustic Imaging by a CMOS Micromachined Capacitive Ultrasonic Sensor" @default.
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- W2145614873 doi "https://doi.org/10.1109/led.2011.2157655" @default.
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