David J. Dowsett MSc PhD, previously Chief Physicist at the Mater Hospital, Dublin, Ireland, is now consultant medical physicist to various hospitals in Ireland and actively involved in teaching graduate and postgraduate students in Ireland and abroad.

Patrick A. Kenny MA MSc PhD is Chief Medical Physicist at the Mater Misericordiae University Hospital Dublin. He is also a lecturer in the Faculty of Radiology and teaches Diploma Courses in Ultrasound, MR, CT and Nuclear Medicine at both Trinity College and University College Dublin.

R. Eugene Johnston MA PhD is a Professor Emeritus from the University of North Carolina, USA, where he taught and carried out research in medical imaging over the past 30 years.