Real-time photoacoustic data acquisition with Philips iU22 ultrasound scanner

J. Dean; V. Gornstein; M. Burcher; L. Jankovic

doi:10.1117/12.763658

28 February 2008 Real-time photoacoustic data acquisition with Philips iU22 ultrasound scanner

J. Dean, V. Gornstein, M. Burcher, L. Jankovic

Proceedings Volume 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics; 685622 (2008) https://doi.org/10.1117/12.763658
Event: SPIE BiOS, 2008, San Jose, California, United States

Abstract

A one of a kind photoacoustic system has been built around a Philips iU22 ultrasound scanner. The modified channel board architecture allows access to the raw per-channel photoacoustic data, while keeping all of the imaging capabilities of an actual commercial ultrasound scanner. A captured photoacoustic data frame is Fourier beamformed to generate a single laser shot photoacoustic image. In addition to the photoacoustic data, the system supplies the beamformed ultrasound data, providing a truly dual-modality imaging capability. A tunable OPO laser system (700-900nm), pumped by an Nd:YAG solid state laser, is used as an illumination source with 5ns long pulses. An FPGA-based electronic board synchronizes the iU22 start of frame with the laser firing, currently permitting photoacoustic imaging at a rate of 10 Hz (laser repetition rate limit). At that imaging frame rate the photoacoustic system, consisting of a PC modified with 32 Gbytes of acquisition memory and an FPGA array, is able to store several minutes of continuously captured data, enabling monitoring and off-line analysis of dynamic photoacoustic events and/or fast scanning for performing pseudo-3D imaging. The system can use all of the standard iU22 array transducers both for photoacoustic imaging, and in all of the ultrasound imaging modes.

Citation Download Citation

J. Dean, V. Gornstein, M. Burcher, and L. Jankovic "Real-time photoacoustic data acquisition with Philips iU22 ultrasound scanner", Proc. SPIE 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 685622 (28 February 2008); https://doi.org/10.1117/12.763658

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