Light modulation for improved photoacoustic feedback on light-induced treatments and procedures
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United States of America Patent
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Mar 30, 2021
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Nov 8, 2018
app pub date -
May 7, 2018
filing date -
May 5, 2017
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Abstract
Methods and systems enabling the real-time monitoring of a light-induced procedure in a biological medium, and/or the acquisition of information related to this biological medium are provided. In some implementations, the light beam used for the procedure is modulated at a modulation frequency selected in view of the photoacoustic frequency response associated with the procedure. The photoacoustic feedback signal from the medium during the procedure is then monitored. This monitoring may involve filtering the photoacoustic feedback signal around the selected feedback modulation frequency. Ratiometric comparisons of the contribution of different frequencies to the photoacoustic feedback signal are also considered.
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