The influences of finite aperture size in photoacoustic computed tomography

Luo, Xiaofei; Jiang, Jinsheng; Wu, Hualin; Li, Minhao; Wang, Bo

doi:10.1016/j.ultras.2023.107042

Ultrasonics

2023

DOI: 10.1016/j.ultras.2023.107042

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The influences of finite aperture size in photoacoustic computed tomography

Xiaofei Luo,

Jinsheng Jiang,

Hualin Wu

et al.

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2024

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Cited by 2 publications

References 38 publications

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Optimization on artifacts in photoacoustic images based on spectrum analyses and signal extraction

Nie,

Yin,

et al. 2024

The Journal of the Acoustical Society of America

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Photoacoustic (PA) imaging is a promising technology for functional imaging of biological tissues, offering optical contrast and acoustic penetration depth. However, the presence of signal aliasing from multiple PA sources within the same imaging object can introduce artifacts and significantly impact the quality of the PA tomographic images. In this study, an optimized method is proposed to suppress these artifacts and enhance image quality effectively. By leveraging signal time-frequency spectrum, signals from each PA source can be extracted. Subsequently, the images are reconstructed using these extracted signals and fused together to obtain an optimized image. To verify this proposed method, PA imaging experiments were conducted on two phantoms and two in vitro samples and the distribution relative error and root mean square error of the images obtained through conventional and optimized methods were calculated. The results demonstrate that the proposed method successfully suppresses the artifacts and substantially improves the image quality.

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Optimization on artifacts in photoacoustic images based on spectrum analyses and signal extraction

Nie,

Yin,

et al. 2024

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

show abstract

Full-view volumetric photoacoustic imaging using a hemispheric transducer array combined with an acoustic reflector

Sun,

Wang,

Wang

et al. 2024

Biomed. Opt. Express

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Photoacoustic computed tomography (PACT) has evoked extensive interest for applications in preclinical and clinical research. However, the current systems suffer from the limited view provided by detection setups, thus impeding the sufficient acquisition of intricate tissue structures. Here, we propose an approach to enable fast 3D full-view imaging. A hemispherical ultrasonic transducer array combined with a planar acoustic reflector serves as the ultrasonic detection device in the PACT system. The planar acoustic reflector can create a mirrored virtual transducer array, and the detection view range can be enlarged to cover approximately 3.7 π steradians in our detection setup. To verify the effectiveness of our proposed configuration, we present the imaging results of a hair phantom, an in vivo zebrafish larva, and a leaf skeleton phantom. Furthermore, the real-time dynamic imaging capacity of this system is demonstrated by observing the movement of zebrafish within 2 s. This strategy holds great potential for both preclinical and clinical research by providing more detailed and comprehensive images of biological tissues.

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The influences of finite aperture size in photoacoustic computed tomography

Cited by 2 publications

References 38 publications

Optimization on artifacts in photoacoustic images based on spectrum analyses and signal extraction

Optimization on artifacts in photoacoustic images based on spectrum analyses and signal extraction

Full-view volumetric photoacoustic imaging using a hemispheric transducer array combined with an acoustic reflector

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