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|Main Title:||A Mumford–Shah-type approach to simultaneous reconstruction and segmentation for emission tomography problems with Poisson statistics|
|Abstract:||We propose a variational model to simultaneous reconstruction and segmentation in emission tomography. As in the original Mumford–Shah model  we use the contour length as penalty term to preserve edge information whereas a different data fidelity term is used to measure the information discrimination between the computed tomography data of the reconstructed object and the observed (or simulated) data. As data fidelity term we use the Kullback–Leibler divergence which originates from the Poisson distribution present in emission tomography. In this paper we focus on piecewise constant reconstructions which is a reasonable assumption in medical imaging. The segmenting contour as well as the corresponding reconstructions are found as minimizers of a Mumford–Shah-type functional over the space of piecewise constant functions. The numerical scheme is implemented by evolving the level-set surface according to the shape derivative of the functional. The method is validated for simulated data with different levels of noise.|
|DDC Class:||DDC::500 Naturwissenschaften und Mathematik::510 Mathematik::510 Mathematik|
|Sponsor/Funder:||EC/FP7/600209/EU/International Post-Doc Initiative of the Technische Universität Berlin/IPODI|
FWF, T 529-N18, Mumford-Shah models for tomography II
FWF, W 1214, Doktoratskolleg "Computational Mathematics"
|Usage rights:||Terms of German Copyright Law|
|Journal Title:||Journal of inverse and ill-posed problems|
|Appears in Collections:||Technische Universität Berlin » Fakultäten & Zentralinstitute » Fakultät 2 Mathematik und Naturwissenschaften » Institut für Mathematik » Fachgebiet Numerische Mathematik » Publications|
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