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dc.contributor.authorHänninen, Niko
dc.contributor.authorPulkkinen, Aki
dc.contributor.authorLeino, Aleksi
dc.contributor.authorTarvainen, Tanja
dc.date.accessioned2020-05-25T09:32:35Z
dc.date.available2020-05-25T09:32:35Z
dc.date.issued2020
dc.identifier.urihttps://erepo.uef.fi/handle/123456789/8140
dc.description.abstractIn quantitative photoacoustic tomography, the aim is to reconstruct distributions of optical parameters of an imaged target from an initial pressure distribution obtained from ultrasound measurements. In order to obtain accurate and quantitative information on the optical parameters, modeling light transport in the target is required. Utilizing an approximative model for light transport would be favorable to reduce the computational cost, but the modeling errors of the approximative model can result in significant errors in the reconstructions. In this work, we approach the image reconstruction problem of quantitative photoacoustic tomography in the Bayesian framework. We utilize the Bayesian approximation error method to compensate for the modeling errors between the diffusion approximation and Monte Carlo model for light transport. The approach is studied with two-dimensional numerical simulations with varying optical parameters and noise levels. The results show that Bayesian approximation error method can be used to reduce the effects of the modeling errors in quantitative photoacoustic tomography in a wide range of optical parameters.
dc.language.isoenglanti
dc.publisherElsevier BV
dc.relation.ispartofseriesJournal of quantitative spectroscopy and radiative transfer
dc.relation.urihttp://dx.doi.org/10.1016/j.jqsrt.2020.107065
dc.rightsCC BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectinverse problems
dc.subjectquantitative photoacoustic tomography
dc.subjectuncertainty quantification
dc.subjectbayesian methods
dc.subjectmodel reduction
dc.subjectbayesian approximation error modeling
dc.titleApplication of diffusion approximation in quantitative photoacoustic tomography in the presence of low-scattering regions
dc.description.versionfinal draft
dc.contributor.departmentDepartment of Applied Physics, activities
uef.solecris.id70727502en
dc.type.publicationTieteelliset aikakauslehtiartikkelit
dc.rights.accessrights©2020ElsevierLtd.
dc.relation.doi10.1016/j.jqsrt.2020.107065
dc.description.reviewstatuspeerReviewed
dc.format.pagerange107065
dc.relation.issn0022-4073
dc.relation.volume250
dc.rights.accesslevelopenAccess
dc.type.okmA1
uef.solecris.openaccessEi


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