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- W4385753612 abstract "Biomedical photoacoustics is usually used to image absorption-based contrast in soft tissues up to depths of several centimeters and with sub-millimeter resolution. By contrast, measuring Photoacoustic (PA) signals through hard bone tissue shows severe signal degradation due to aberration and high attenuation of high frequency acoustic signal components. This is particularly noticeable when measuring through thicker, human, skull bone. Which is the main reason why transcranial PA imaging in humans has so far proved challenging to implement. To tackle this challenge, we developed an optical resonator sensor based on a previous planar-concave design. This sensor was found to be highly suitable for measuring the low-pressure amplitude and low acoustic frequency signals that are transmitted through human cranial bone. A plano-concave optical resonator sensor was fabricated to provide high sensitivity in the acoustic frequency range of DC to around 2 MHz, a low noise equivalent pressure and a small active element size enabling it to significantly outperform conventional piezoelectric transducers when measuring PA waves transmitted through ex vivo human cranial bones." @default.
- W4385753612 created "2023-08-12" @default.
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- W4385753612 date "2023-08-11" @default.
- W4385753612 modified "2023-09-27" @default.
- W4385753612 title "Plano-concave optical sensor for transcranial photoacoustic measurements" @default.
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- W4385753612 doi "https://doi.org/10.1117/12.2675593" @default.
- W4385753612 hasPublicationYear "2023" @default.
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