1. Department of Computer Science and Information EngineeringNational Cheng‐Kung UniversityTainan Taiwan
2. Institute of Medical InformaticsNational Cheng‐Kung UniversityTainan Taiwan
3. Department of RadiologyBrigham and Women's Hospital, Harvard Medical SchoolBoston Massachusetts USA
4. Department of RadiologySahlgrenska University Hospital, Gothenburg UniversityGothenburg Sweden