Fast Quasi-Newton Algorithms for Penalized Reconstruction in Emission Tomography and Further Improvements via Preconditioning.
Yu-Jung TsaiAlexandre BousseMatthias J. EhrhardtCharles W. StearnsSangtae AhnBrian F. HuttonSimon R. ArridgeKris ThielemansPublished in: IEEE Trans. Medical Imaging (2018)