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Deep microlocal reconstruction for limited-angle tomography
Ludwig Maximilians Univ Munchen, Dept Math, D-80333 Munich, Germany..
Ludwig Maximilians Univ Munchen, Dept Math, D-80333 Munich, Germany.;Univ Tromso, Dept Phys & Technol, N-9019 Tromso, Norway..ORCID-id: 0000-0001-9738-2487
KTH, Skolan för teknikvetenskap (SCI), Matematik (Inst.), Matematik (Avd.). Department of Information Technology, Division of Scientific Computing, Uppsala University, Uppsala, Sweden.ORCID-id: 0000-0002-1118-6483
Univ Vienna, Fac Math, A-1090 Vienna, Austria.;Univ Vienna, Res Network Data Sci, A-1090 Vienna, Austria..
2022 (engelsk)Inngår i: Applied and Computational Harmonic Analysis, ISSN 1063-5203, E-ISSN 1096-603X, Vol. 59, s. 155-197Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We present a deep-learning-based algorithm to jointly solve a reconstruction problem and a wavefront set extraction problem in tomographic imaging. The algorithm is based on a recently developed digital wavefront set extractor as well as the well-known microlocal canonical relation for the Radon transform. We use the wavefront set information about x-ray data to improve the reconstruction by requiring that the underlying neural networks simultaneously extract the correct ground truth wavefront set and ground truth image. As a necessary theoretical step, we identify the digital microlocal canonical relations for deep convolutional residual neural networks. We find strong numerical evidence for the effectiveness of this approach.

sted, utgiver, år, opplag, sider
Elsevier BV , 2022. Vol. 59, s. 155-197
Emneord [en]
Inverse problems, Deep learning, Tomography, Microlocal analysis, Wavefront set
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Identifikatorer
URN: urn:nbn:se:kth:diva-314234DOI: 10.1016/j.acha.2021.12.007ISI: 000798563300005Scopus ID: 2-s2.0-85122624648OAI: oai:DiVA.org:kth-314234DiVA, id: diva2:1671350
Merknad

QC 20220617

Tilgjengelig fra: 2022-06-17 Laget: 2022-06-17 Sist oppdatert: 2022-06-25bibliografisk kontrollert

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Öktem, Ozan

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