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Chinese Journal of Biomedical Engineering  2021, Vol. 40 Issue (6): 731-742    DOI: 10.3969/j.issn.0258-8021.2021.06.10
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Influence of Ultrasonic Detector Characteristics on Image Quality in Biological Photoacoustic Tomography and its Solution
Sun Zheng1,2*, Sun Huifeng1,2
1(Department of Electronic and Communication Engineering, North China Electric Power University, Baoding 071003,Hebei, China)
2(Hebei Key Laboratory of Power Internet of Things Technology, North China Electric Power University, Baoding 071003, Hebei, China)
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Abstract  Biomedical photoacoustic tomography (PAT) is an emerging hybrid functional imaging modality by multi-physics coupling for early detection and accurate diagnosis of tumors and cardiac vessel diseases. For simplicity, most PAT image reconstruction methods are based on an ideal assumption that the photoacoustically generated ultrasonic waves are collected by an ideal point-like detector with an omnidirectional response forming a continuous and complete measuring surface around the object. The influence of the spatial impulse response (SIR) and electrical impulse response (EIR) of the detector on the reconstruction quality is not considered. However, in practical applications, this assumption is usually infeasible, resulting in the reduction in the imaging resolution and the degradation of the image quality. This paper aimed to analyze the influence of the characteristics of the ultrasonic detector on PAT image reconstruction including limited aperture effect, SIR and EIR, directivity, scanning radius, limited view-angle and frequency bandwidth, and positional uncertainty. Moreover, the solutions to above problems were summarized and their advantages, limitations, applications, and potential developments in the future were discussed as well.
Key wordsphotoacoustic tomography(PAT)      image reconstruction      ultrasonic detector characteristics      finite aperture     
Received: 22 September 2020     
PACS:  R318  
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Sun Zheng
Sun Huifeng
Cite this article:   
Sun Zheng,Sun Huifeng. Influence of Ultrasonic Detector Characteristics on Image Quality in Biological Photoacoustic Tomography and its Solution[J]. Chinese Journal of Biomedical Engineering, 2021, 40(6): 731-742.
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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021.2021.06.10     OR     http://cjbme.csbme.org/EN/Y2021/V40/I6/731
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