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- W2074954612 abstract "Photoacoustic imaging may be used to detect tumor masses in biological tissue. In particular, time of flight measurements of the photoacoustic waves may indicate tumor location. Here we use time of flight information to localize spherical photoacoustic sources in tissue phantoms. A Q- switched, frequency-doubled Nd:YAG laser operating at 532nm with a pulse duration of 5 ns irradiated absorbing spheres 2 mm in diameter. The spheres were in mineral oil or turbid acrylamide blocks. A PVDF acoustic transducer was built and used to detect the acoustic waves. The position of the detector was translated so that the time of flight information from two acoustic waveforms from the source could be correlated by a convolution algorithm. This convolution result in a 2D map indicating the position of the source. Source location was indicated to within 5 percent of the true location for acoustic propagation distances of 20 mm. An image source is also indicated when the true source was in proximity to a reflecting boundary." @default.
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- W2074954612 date "2000-05-19" @default.
- W2074954612 modified "2023-09-24" @default.
- W2074954612 title "<title>Localization of spherical photoacoustic sources in acrylamide gels using time domain measurements</title>" @default.
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- W2074954612 doi "https://doi.org/10.1117/12.386309" @default.
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