1 Penn Image Computing and Science Laboratory (PICSL), Department of Radiology, University of Pennsylvania, 3700 Hamilton Walk, Suite D600, Richards Building 6 Floor, Philadelphia, PA, 19104, USA. Long.Xie@uphs.upenn.edu.
2 Penn Image Computing and Science Laboratory (PICSL), Department of Radiology, University of Pennsylvania, 3700 Hamilton Walk, Suite D600, Richards Building 6 Floor, Philadelphia, PA, 19104, USA.
3 Penn Memory Center, University of Pennsylvania, Philadelphia, PA, USA.
4 Department of Diagnostic Radiology, Lund University, Lund, Sweden.
5 Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA.