Polymer-based ultrawideband transducers for high resolution hemispherical optoacoustic tomography

Area of Science:

• Biomedical Engineering
• Medical Imaging
• Acoustic Physics

Background:

• Current optoacoustic tomography transducers lack ultrawide bandwidth, impedance matching, and form factor flexibility.
• Polyvinylidene fluoride (PVDF) offers potential but has inherent challenges for high-performance systems.

Purpose of the Study:

• To develop a high-performance hemispherical optoacoustic tomography system overcoming limitations of existing transducers.
• To demonstrate the efficacy of a polyvinylidene fluoride (PVDF)-based spherical array for functional optoacoustic micro-angiography.

Main Methods:

• Fabrication of an ultrawideband, high-density polymer-based spherical array using PVDF.
• Integration of the PVDF array into a hemispherical optoacoustic tomography system.
• System characterization for performance evaluation in functional optoacoustic micro-angiography.

Main Results:

• The developed PVDF-based system achieves ultrawide bandwidth and good impedance matching.
• Reverberation artifacts are minimized, enhancing image quality.
• The system demonstrates high performance for functional optoacoustic micro-angiography applications.

Conclusions:

• A novel PVDF-based hemispherical optoacoustic tomography system successfully addresses prior design limitations.
• This advancement enables high-performance functional optoacoustic micro-angiography with improved imaging capabilities.
• The study highlights the potential of advanced polymer-based transducers in biomedical imaging.