Institutions University College London, Dept. Medical Physics & Bioengineering, United Kingdom University of Pennsylvania Medical Center, Medical Image Processing Group, USA University of Zagreb, Image Processing Group, Croatia Karl-Franzens-Universität, Universitätsklinik für Radiologie, Austria Clarkson University, USA University of Vienna, Austria Drexel University, USA University of Almeria , Departamento de Arquitectura de Computadores y Electronica , Spain University of Ljubljana, Slovenia Medical University of Lodz, Poland Uppsala University, Sweden West University of Timisoara, Romania University of Turku Turku Center for Computer Science, Finland Technical University of Cluj Napoca Lajos Kossuth University, Inst. of Mathematics and Informatics, Hungary Computer and Automation Research Institute of the Hungarian Academy of Sciences, Image and Pattern Analysis Group and Analogical & Neural Computing Laboratory, Hungary University of Veszprém, Department of Image Processing and Neurocomputing, Hungary Technical University of Budapest, Hungary József Attila University, Dept. of Informatics, Hungary