Hans P Niendorf, MD is Senior Medical Advisor, Diagnostic Imaging, with Bayer Schering Pharma AG, Berlin. He has been the Head of Clinical Development and Medical Affairs, Diagnostic Imaging, for 15 years at Schering AG. Dr Niendorf has been involved with or responsible for the clinical development of various contrast agents, such as Iopromide (Ultravist®), Iotrolan (Isovist®) for X-ray imaging, and Gd-DTPA (Magnevist®) for MRI. Dr Niendorf joined the Schering AG in 1981. Dr Niendorf is a board certified radiologist, who performed his residency at the University of Munich. He received his medical degree from the University of Erlangen.