@PHDTHESIS\{IMM1998-02482, author = "P. A. Philipsen", title = "Reconstruction and restoration of {PET} images", year = "1998", pages = "134", school = "Informatics and Mathematical Modelling, Technical University of Denmark, {DTU}", address = "Richard Petersens Plads, Building 321, {DK-}2800 Kgs. Lyngby", type = "", url = "http://www2.compute.dtu.dk/pubdb/pubs/2482-full.html" }