TY - THES A1 - Dicken, Volker T1 - Simultaneous Activity and Attenuation Reconstruction in Single Photon Emission Computed Tomography, a Nonlinear Ill-Posed Problem Y1 - 1997 UR - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/24054 CY - Potsdam ER -