Acoustically penetrable optical reflector for photoacoustic tomography

Area of Science:

• Biomedical Optics
• Acousto-Optics
• Medical Imaging

Background:

• Photoacoustic tomography (PAT) relies on detecting ultrasound signals from light-absorbing objects.
• Conventional PAT systems face challenges due to non-transparent piezoelectric ultrasound transducers, hindering simultaneous light delivery and signal detection.
• This optical-ultrasonic conflict limits the efficiency and applicability of existing PAT technologies.

Purpose of the Study:

• To introduce and evaluate a novel acoustically penetrable optical reflector (APOR) as a solution to the optical-ultrasonic conflict in PAT.
• To demonstrate the effectiveness of the APOR in facilitating simultaneous light illumination and photoacoustic signal detection.
• To assess the compatibility and potential implementation of the APOR concept across various PAT systems.

Main Methods:

• Development and characterization of a novel acoustically penetrable optical reflector (APOR).
• Experimental integration and testing of the APOR within a functional photoacoustic tomography system.
• Quantitative measurement of APOR properties and performance evaluation in a PAT setup.

Main Results:

• The APOR was successfully fabricated and its acoustic and optical properties were measured.
• Experimental results confirmed that the APOR effectively allows photoacoustic signal detection by the ultrasound transducer.
• The APOR did not impede the necessary light illumination for PAT operation, resolving the core conflict.

Conclusions:

• The developed APOR provides an effective solution to the inherent conflict between optical illumination and ultrasonic detection in PAT.
• The APOR concept is versatile and can be readily integrated into diverse photoacoustic tomography system designs.
• This innovation holds significant potential for advancing PAT imaging capabilities and applications.