Virtual parallel-projection model-based optoacoustic reconstruction scheme for flat optoacoustic detector

Jiao Li; Shaoze Song; Yihan Wang; Tong Lu; Songhe Zhang; Feng Gao

doi:10.1117/12.2509757

27 February 2019 Virtual parallel-projection model-based optoacoustic reconstruction scheme for flat optoacoustic detector

Jiao Li, Shaoze Song, Yihan Wang, Tong Lu, Songhe Zhang, Feng Gao

Author Affiliations +

Proceedings Volume 10878, Photons Plus Ultrasound: Imaging and Sensing 2019; 108786A (2019) https://doi.org/10.1117/12.2509757
Event: SPIE BiOS, 2019, San Francisco, California, United States

Abstract

The characteristics of the transducer, such as the transducer shape, have a significant impact on the image performance in optoacoustic (photoacoustic) imaging. Several reconstruction algorithms have considered the shape of the transducer in the optoacoustic reconstruction process, showing the improvement in image quality compared to reconstruction procedures with the point detector approximation. One flexible approach assumes the surface of transducer that consists of a set of surface elements. However, this approach suffers from long computation time and excessive memory consumption, especially for model-based reconstruction strategies. Herein, we present a modified model-based reconstruction algorithm using a virtual parallel-projection method, for the optoacoustic imaging system with flat detector. In this case, the sum of the surface elements' model matrixes can be replaced by a virtual parallel-projection model matrix, in order to reduce the reconstruction time and memory consumption. The proposed method has been performed on numerical simulations, phantom experiments of microspheres with the diameter of 200 μm and in vivo experiments in mice. The reconstruction results of proposed method show the similar image quality as the results of the traditional reconstruction method setting surface elements, while the computation time and memory requirements have been efficiently decreased.

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Jiao Li, Shaoze Song, Yihan Wang, Tong Lu, Songhe Zhang, and Feng Gao "Virtual parallel-projection model-based optoacoustic reconstruction scheme for flat optoacoustic detector", Proc. SPIE 10878, Photons Plus Ultrasound: Imaging and Sensing 2019, 108786A (27 February 2019); https://doi.org/10.1117/12.2509757

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KEYWORDS

Model-based design

Transducers

Optoacoustics

Reconstruction algorithms

Image quality

In vivo imaging

Image processing

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