1. Department of Diagnostic and Interventional Neuroradiology; University Hospital; RWTH Aachen University; Pauwelsstr. 30 52074 Aachen Germany
2. Institute of Tissue Engineering and Textile Implants; RWTH Aachen University; Otto-Blumenthal-Str. 1 52074 Aachen Germany
3. Department of Diagnostic and Interventional Neuroradiology; University Hospital Mainz; 55131 Mainz Germany
4. Institute of Neuropathology; University Hospital; RWTH Aachen University; Pauwelsstr. 30 52074 Aachen Germany
5. Institute of Applied Medical Engineering; University Hospital; RWTH Aachen University; Pauwelsstr. 20 52074 Aachen Germany
6. Institute of Experimental Molecular Imaging; University Hospital; RWTH Aachen University; Pauwelsstr. 30 52074 Aachen Germany