scholarly journals Signal and Image Processing in Biomedical Photoacoustic Imaging: A Review

Optics ◽  
2020 ◽  
Vol 2 (1) ◽  
pp. 1-24
Author(s):  
Rayyan Manwar ◽  
Mohsin Zafar ◽  
Qiuyun Xu
Keyword(s):  
Image Processing ◽  
Biological Tissue ◽  
Photoacoustic Imaging ◽  
Imaging Modality ◽  
Spatiotemporal Resolution ◽  
Signal And Image Processing ◽  
Ultrasound Waves ◽  
Image Processing Techniques ◽  
Non Invasive ◽  
Processing Techniques

Photoacoustic imaging (PAI) is a powerful imaging modality that relies on the PA effect. PAI works on the principle of electromagnetic energy absorption by the exogenous contrast agents and/or endogenous molecules present in the biological tissue, consequently generating ultrasound waves. PAI combines a high optical contrast with a high acoustic spatiotemporal resolution, allowing the non-invasive visualization of absorbers in deep structures. However, due to the optical diffusion and ultrasound attenuation in heterogeneous turbid biological tissue, the quality of the PA images deteriorates. Therefore, signal and image-processing techniques are imperative in PAI to provide high-quality images with detailed structural and functional information in deep tissues. Here, we review various signal and image processing techniques that have been developed/implemented in PAI. Our goal is to highlight the importance of image computing in photoacoustic imaging.

Signal and Image Processing Techniques as Applied to Animal Bioacoustics Problems

2011 ◽  
Vol 7 (3) ◽  
pp. 35 ◽  
Author(s):  
Chris O. Tiemann ◽  
Jules S. Jaffe ◽  
Paul L. D. Roberts ◽  
Natalia A. Sidorovskaia ◽  
George E. Ioup ◽  
...  
Keyword(s):  
Image Processing ◽  
Signal And Image Processing ◽  
Image Processing Techniques ◽  
Processing Techniques

scholarly journals Investigating the cotton ring spun yarn structure using micro computerized tomography and digital image processing techniques

2018 ◽  
Vol 89 (15) ◽  
pp. 3007-3023 ◽  
Author(s):  
Noman Haleem ◽  
Xin Liu ◽  
Christopher Hurren ◽  
Stuart Gordon ◽  
Saeed S Najar ◽  
...  
Keyword(s):  
Image Processing ◽  
Computerized Tomography ◽  
Digital Image Processing ◽  
Digital Image ◽  
Ct Images ◽  
Micro Ct ◽  
Image Processing Techniques ◽  
Non Invasive ◽  
Yarn Structure ◽  
Processing Techniques

The micro-level structure of staple yarn and the fiber arrangement inside it has a decisive influence on its physical properties. This study aims to introduce a combined method based on micro computerized tomography (micro CT) and digital image processing techniques to probe the ring yarn structure in a non-invasive manner. Two micro CT systems at different CT settings were applied to achieve optimal quality CT images of cotton ring yarns. Three image processing algorithms were proposed to enhance and process the yarn CT images in order to extract yarn structural information. The proposed method was also applied on two yarn specimens, which varied significantly in terms of their tensile strength, to study differences in their underlying structures. The results showed that the longitudinal arrangement of fibers in terms of their migratory behavior had a decisive influence on the tensile properties of the yarn. The stronger yarn showed a higher value of the amplitude and intensity of fiber migration compared to the weaker yarn, suggesting that the protocol established in this study can effectively reveal fiber arrangements within a staple yarn structure in a non-invasive manner.

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