Since January 3rd, Ralph Brecheisen is with the Visualization Group. Ralph is a Phd student in his final year from the Biomedical Image Analysis group in Eindhoven. Ralph is interested in DTI and uncertainty visualization in fiber tracking but also more general in quantification and 3D interaction. Ralph stays four weeks and has many discussions with all group members, in particular with Rocco and Mathias about blood flow data since there is also a lot of postprocessing involved and interaction is challenging.