​Gerd Rosenbusch, MD, is Emeritus Professor of Abdominal Radiology. He was born in 1934 in Stadtsteinach, a small town in Northern Bavaria, Germany. He received his training in radiology at the hospital of RWTH Aachen, Germany. After completing his specialization, he worked for a short period in a private practice and then moved in 1971 to Radboud University, Nijmegen, the Netherlands. He was appointed Professor in Radiology in 1980 and retired in 1996. His interest in the history of radiology started many years before his retirement. Besides authoring publications on radiology, to be named is Kolon. Klinische Radiologie-Endoskopie (together with J.W.A.J. Reeders), he has been coeditor of several books on the history of radiology, especially in the Netherlands. Annemarie de Knecht-van Eekelen, PhD, was born in 1945 in Utrecht, the Netherlands. She studied biology in her hometown university and in 1984 received a doctorate in the history of medicine for her thesis Towards a rational infant feeding. The science of nutrition and paediatrics in the Netherlands 1840–1914. From 1991 to 1998 she taught history of medicine at the Free University of Amsterdam. Until 2007 she managed the international consultancy and training activities of Cito, Institute for Educational Measurement in Arnhem, the Netherlands. She has written over a hundred articles and several books on the history of medicine, including a history of radiology in the Netherlands.