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  • Title: Photoacoustic-imaging-based temperature monitoring for high-intensity focused ultrasound therapy.
    Author: Xun Wu, Sanders JL, Stephens DN, Oralkan O.
    Journal: Annu Int Conf IEEE Eng Med Biol Soc; 2016 Aug; 2016():3235-3238. PubMed ID: 28268997.
    Abstract:
    Temperature monitoring during high-intensity focused ultrasound (HIFU) application is necessary to ensure effective therapy while minimizing thermal damage to adjacent tissue. In this study, we demonstrate a noninvasive approach for temperature measurement during HIFU therapy based on photoacoustic imaging (PAI). Because of the dependence of photoacoustic (PA) signal amplitude on temperature of the source tissue and the linearity of the PAI system, changes in temperature will cause changes in PA image intensity. Experiments have been conducted in ex-vivo bovine tissue to characterize the linear dependence of PA image pixel values on temperature and subsequently to convert the PA image to a real-time temperature map.
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