Print Email Facebook Twitter B1-based SAR reconstruction using contrast source inversion–electric properties tomography (CSI-EPT) Title B1-based SAR reconstruction using contrast source inversion–electric properties tomography (CSI-EPT) Author Balidemaj, E. (Amsterdam UMC) van den Berg, Cornelis A.T. (University Medical Center Utrecht) van Lier, Astrid L.H.M.W. (University Medical Center Utrecht) Nederveen, Aart J. (Amsterdam UMC) Stalpers, Lukas J.A. (Amsterdam UMC) Crezee, Hans (Amsterdam UMC) Remis, R.F. (TU Delft Signal Processing Systems) Date 2016-04-23 Abstract Specific absorption rate (SAR) assessment is essential for safety purposes during MR acquisition. Online SAR assessment is not trivial and requires, in addition, knowledge of the electric tissue properties and the electric fields in the human anatomy. In this study, the potential of the recently developed CSI-EPT method to reconstruct SAR distributions is investigated. This method is based on integral representations for the electromagnetic field and attempts to reconstruct the tissue parameters and the electric field strength based on B+1B1+ field data only. Full three-dimensional FDTD simulations using a female pelvis model are used to validate two-dimensional CSI reconstruction results in the central transverse plane of a 3T body coil. Numerical experiments demonstrate that the reconstructed SAR distributions are in good agreement with the SAR distributions as determined via 3D FDTD simulations and show that these distributions can be computed very efficiently in the central transverse plane of a body coil with the two-dimensional approach of CSI-EPT. Subject B1 mapsSpecific absorption rate (SAR)Contrast source inversion (CSI)Electric properties tomography (EPT)Conductivity To reference this document use: http://resolver.tudelft.nl/uuid:c8da6c33-fd21-4917-8e3a-84726bb0d28d DOI https://doi.org/10.1007/s11517-016-1497-6 ISSN 0140-0118 Source Medical & Biological Engineering & Computing, 55 (2), 225-233 Part of collection Institutional Repository Document type journal article Rights © 2016 E. Balidemaj, Cornelis A.T. van den Berg, Astrid L.H.M.W. van Lier, Aart J. Nederveen, Lukas J.A. Stalpers, Hans Crezee, R.F. Remis Files PDF art_3A10.1007_2Fs11517_01 ... 1497_6.pdf 2.24 MB Close viewer /islandora/object/uuid:c8da6c33-fd21-4917-8e3a-84726bb0d28d/datastream/OBJ/view