首页|Noncontact ultrasound sensing based on Mach-Zehnder homodyne interferometer for photoacoustic imaging
Noncontact ultrasound sensing based on Mach-Zehnder homodyne interferometer for photoacoustic imaging
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维普
We present a novel noncontact ultrasound[US]and photoacoustic imaging[PAI]system,overcoming the limitations of traditional coupling media.Using a long coherent length laser,we employ a homodyne free-space Mach-Zehnder setup with zero-crossing triggering,achieving a noise equivalent pressure of 703 Pa at 5 MHz and a-6 dB bandwidth of 1 to 8.54 MHz.We address the phase uncertainty inherent in the homodyne method.Scanning the noncontact US probe enables photoacoustic computed tomography[PACT].Phantom studies demonstrate imaging performance and system stability,underscoring the potential of our system for noncontact US sensing and PAl.
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维普
