# Polymer-based ultrawideband transducers for high resolution hemispherical optoacoustic tomography

## TL;DR

This paper introduces a new type of transducer for high-resolution imaging that works well in curved shapes and could be used in various medical applications.

## Contribution

The paper presents a high-performance, ultrawideband PVDF-based transducer system for hemispherical optoacoustic tomography.

## Key findings

- The developed transducer meets the necessary design criteria for high-performance hemispherical optoacoustic tomography.
- The system overcomes the known shortcomings of PVDF material for this application.
- The technology shows potential for use in hand vascular, dental, ophthalmic, and endoscopic applications.

## Abstract

Available transducers do not fulfill all of the necessary design criteria for high-performance hemispherical optoacoustic tomography, namely: an ultrawide bandwidth in order to acquire the full range of optoacoustic emissions from targets of interest, good impedance matching to minimize reverberation artifacts, and a modifiable form factor, for inclusion in non-flat geometries. Polyvinylidene fluoride (PVDF) transducers can, in principle, meet all of these criteria, but PVDF has known shortcomings. In Ultrawideband high-density polymer-based spherical array for functional optoacoustic micro-angiography, all of the challenges of working with PVDF are overcome with the demonstration of a high-performance PVDF-based hemispherical optoacoustic tomographic system.

A representation of ultrawideband PVDF/co-polymer-based ultrasound (US) transducer technology for high-frequency hemispherical optoacoustic tomography and its potential use in hand vascular, dental, ophthalmic, and endoscopic applications.