[1] Department of Electronic and Computer Engineering, Brunel University London, UK, Uxbridge, United Kingdom
[2] Division of Nuclear Medicine and Molecular Imaging, Department of Medical Imaging, Geneva University Hospital, Geneva, Switzerland
[3] Geneva University Neurocenter, Geneva University, Geneva, Switzerland
[4] Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
[5] Department of Nuclear Medicine, University of Southern Denmark, Odense, Denmark
[6] Department of Computer Science, University of Sharjah, Sharjah, United Arab Emirates
[7] Institute of Artificial Intelligence, De Montfort University, UK, Leicester, United Kingdom