1. Department of Technical Physics University of Eastern Finland Kuopio Finland
2. Diagnostic Imaging Center Kuopio University Hospital Kuopio Finland
3. Center of Oncology Kuopio University Hospital Kuopio Finland
4. Departments of Biomedical Engineering, Chemistry, and Medicine Boston University Boston Massachusetts USA
5. Science Service Center Kuopio University Hospital Kuopio Finland
6. School of Electrical Engineering and Computer Science The University of Queensland Brisbane Australia