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Compressed system models in multispectral optoacoustic tomography.
In: (12th IEEE International Symposium on Biomedical Imaging, 16-19 April 2015, Brooklyn; United States). 2015. 1228-1231
One of the challenges of multispectral optoacoustic tomography (MSOT) is the reconstruction of the images from the projection data. Conventionally, analytical inversion formulae are used owing to their simplicity and numerical efficiency. However, such solutions are often limited to ideal detection scenarios and lead to image artifacts when the system characteristics deviate from the assumed ones. In such cases, image quality may be improved by adopting a model-based approach in which the MSOT system is modeled via a matrix relation, which is subsequently inverted using established algebraic techniques to reconstruct the image. Nonetheless, model-based inversion is usually more computationally demanding than its analytical counterparts owing to the large size of the model matrix. In this paper, we analyze the sparsity that exists in the model matrix and show how it may be exploited for accelerating image reconstruction. In particular, a wavelet-packet framework is presented under which the size of the model matrix may be reduced.
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Publication type
Article: Conference contribution
Keywords
Inverse Problems ; Optoacoustic Imaging ; Sparsity ; Tomography ; Wavelet Packets
ISSN (print) / ISBN
1945-7928
e-ISSN
1945-8452
Conference Title
12th IEEE International Symposium on Biomedical Imaging
Conference Date
16-19 April 2015
Conference Location
Brooklyn; United States
Quellenangaben
Pages: 1228-1231
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Institute(s)
Institute of Biological and Medical Imaging (IBMI)