Center for Biomedical Image Analysis, Masaryk University, 602 00 Brno, Czech Republic, Cancer Imaging Laboratory, Oncology Division, Center for Applied Medical Research, University of Navarra, 31008 Pamplona, Spain, Biomedical Imaging Group Rotterdam, Erasmus University Medical Center, 3015 GE Rotterdam, The Netherlands, Fusion Technology and Systems Department, Compunetix Inc., Monroeville, PA 15146, USA, Biomedical Computer Vision Group, Department of Bioinformatics and Functional Genomics, University of Heidelberg, BIOQUANT, IPMB and DKFZ, 69120 Heidelberg, Germany, KTH Royal Institute of Technology, ACCESS Linnaeus Center, Department of Signal Processing, 100 44 Stockholm, Sweden, Baxter Laboratory for Stem Cell Biology, Department of Microbiology and Immunology, Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA, Division of Image Processing, Leiden University Medical Center, 2300 RC Leiden, The Netherlands, Institute of Cellular Biology and Pathology, First Faculty of Medicine, Charles University in Prague, 12801 Prague 2, Czech Republic and Biomedical Image Technologies, Universidad Politxc3xa9cnica de Madrid & CIBER BBN, 28040 Madrid, SpainCenter for Biomedical Image Analysis, Masaryk University, 602 00 Brno, Czech Republic, Cancer Imaging Laboratory, Oncology Division, Center for Applied Medical Research, University of Navarra, 31008 Pamplona, Spain, Biomedical Imaging Group Rotterdam, Erasmus University Medical Center, 3015 GE Rotterdam, The Netherlands, Fusion Technology and Systems Department, Compunetix Inc., Monroeville, PA 15146, USA, Biomedical Computer Vision Group, Department of Bioinformatics and Functional Genomics, University of Heidelberg, BIOQUANT, IPMB and DKFZ, 69120 Heidelberg, Germany, KTH Royal Institute of Technology, ACCESS Linnaeus Center, Department of Signal Processing, 100 44 Stockholm, Sweden, Baxter Laboratory for Stem Cell Biology, Department of Microbiology and 