Medical Physics

Ian Paddick

Chief Physicist
Ian began his career as a Medical Physicist in 1989, working at the Hammersmith hospital, London. Since 1998 he has worked almost exclusively with the Gamma Knifeusing the B, 4C, Perfexion and ICON Gamma Knife models.

He is a regular speaker and moderator at Radiosurgery conferences, teaching on training courses and helping start up new Gamma Knife centres worldwide.

He is on the scientific committees of the International Stereotactic Radiosurgery Society and the Leksell Gamma Knife Society and is currently Vice-President of the ISRS and BRS.

His publications in Radiosurgery have established him as an authority in Radiosurgery dose planning. In 2003, Ian became a freelance physicist, providing physics services to Gamma Knife centres in the UK and USA, as well as the manufacturers of the Gamma Knife; Elekta Instruments. In 2009 he published “Radiosurgery Treatment Planning”, the first book covering practical techniques of dose planning.

Phil Tapper

Senior Radiosurgery Physicist
After graduating in Physics & Astrophysics from Queen Elizabeth College, London Phil trained in Radiation Physics at the Medical College of St Bartholomew’s Hospital which led to the award of an MSc in 1985. He then worked for a number of years in the NHS before moving into the private sector, eventually becoming Head of the Medical Physics Department including the London Gammaknife Centre at the Harley Street Cancer Centre. Since 2008 he has been providing radiosurgical physics support as a consultant, to Gamma Knife Centres.

After working in Radiation Protection for about 2 years he transferred to Radiotherapy at The Middlesex Hospital in 1988. He worked there for 5 years before moving on to the Royal Marsden NHS Trust in Fulham where he spent a further 6 years in Radiotherapy. These NHS posts gave Phil a thorough grounding in all aspects of radiotherapy physics within large teaching hospital environments.

In 1999, Phil moved into the private sector as Deputy Chief Physicist at The Harley Street Cancer Centre, a facility of the HCA International group of hospitals. Within a year he had been promoted to Chief Physicist and carried on to head the Medical Physics Department for a further 8 years. During his time at HSCC he oversaw the expansion of prostate seed brachytherapy and radionuclide therapy as well as the development of the Radiotherapy Department into a nationally recognised site of clinical excellence. More pertinently, in 2006, HCA International took over the London Gamma Knife Centre, and Phil’s department provided the physics support to this new facility.

Alexis Dimitriadis

Senior Radiosurgery Physicist
Alex has  experience of using various SRS treatment platforms internationally. He has undertaken intensive clinical training on Gamma Knife SRS  in four different centres – National Hospital for Neurology and Neurosurgery, Cromwell Hospital, St. Barts Hospital and BMI Thornbury Hospital. He has recently submitted his PhD in Radiotherapy Physics.