High-resolution ultrasonic imaging using an etalon detector array

Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA
Applied Physics Letters (Impact Factor: 3.3). 10/2008; 93(11):113501 - 113501-3. DOI: 10.1063/1.2982584
Source: IEEE Xplore


A photoacoustic imaging system was built and tested to demonstrate the feasibility of high-resolution low-noise ultrasonic imaging based on parallel detection using polymer etalons. Its capability of detecting ultrasound at different elements simultaneously in the optical end was verified by imaging three 49 μ m beads. An average noise-equivalent pressure of 3.6 kPa over 50 MHz for 50 μ m diameter detection elements in a two-dimensional array with a diameter of 1.35 mm and a detection bandwidth of 75 MHz at –3 dB was measured. These results demonstrate the potential of polymer etalons for high-frame-rate high-resolution three-dimensional photoacoustic and ultrasound pulse-echo imaging.

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