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• W4377013799 abstract "In photoacoustic tomography (PAT) with a flat sensor, we routinely encounter two types of limited data. The first is due to using a finite sensor and is especially perceptible if the region of interest is large relative to the sensor or located farther away from the sensor. In this paper, we focus on the second type caused by a varying sensitivity of the sensor to the incoming wavefront direction, which can be modelled as binary, i.e., by a cone of sensitivity. Such visibility conditions result, in the Fourier domain, in a restriction of both the image and the data to a bowtie, akin to the one corresponding to the range of the forward operator. The visible wavefrontsets in image and data domains, are related by the wavefront direction mapping. We adapt the wedge restricted curvelet decomposition, we previously proposed for the representation of the full PAT data, to separate the visible and invisible wavefronts in the image. We optimally combine fast approximate operators with tailored deep neural network architectures into efficient learned reconstruction methods which perform reconstruction of the visible coefficients, and the invisible coefficients are learned from a training set of similar data." @default.
• W4377013799 created "2023-05-19" @default.
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• W4377013799 date "2023-05-18" @default.
• W4377013799 modified "2023-10-13" @default.
• W4377013799 title "On Learning the Invisible in Photoacoustic Tomography with Flat Directionally Sensitive Detector" @default.
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• W4377013799 doi "https://doi.org/10.1137/22m148793x" @default.
• W4377013799 hasPublicationYear "2023" @default.
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