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Professor William Evans MBE MA(Oxon) PhD(Wales) FInstP FIPEM FSRP HonMRCR CPhys CSci CRadP

Professor William Evans

MBE MA(Oxon) PhD(Wales) FInstP FIPEM FSRP HonMRCR CPhys CSci CRadP

Honorary Professor

School of Engineering

+44 (0)77 0217 4012
Medical Physics - Room GTB2/35, Main Hospital Building, University Hospital of Wales, Heath Park, Cardiff, CF14 4XN
Welsh speaking
Available for postgraduate supervision


I am a medical physicist and registered clinical scientist; I worked in the National Health Service for over 40 years. In 2017, I retired as Head of Medical Physics and Clinical Engineering in the Cardiff and Vale University Health Board, based at the University Hospital of Wales. The responsibilities of the post included the provision of a wide range of clinical, scientific and technical services but my own areas of expertise were nuclear medicine, bone densitometry, body composition measurement and radiation safety. In 2021, I returned to work for the Health Board as a Consultant Clinical Scientist ito support the bone densitometry and osteoporosis services.

Throughout my career, I had a strong interest in teaching, training and research. I am an Honorary Professor in the School of Engineering and I have co-supervised several PhD students whose projects have involved various aspects of medical radiation physics and engineering.  In addition, I have acted as reviewer and internal examiner for Cardiff University research degrees.



1981-1983           University College Cardiff: Postgraduate Diploma (Computer Studies)

1972-1976           University of Wales (University College Cardiff): PhD (Atomic Physics)

1969-1972           University of Oxford (Jesus College): BA (Physics), MA (1976)

1962-1969           Whitland Grammar School, Carmarthenshire: O level and A/S level Certificates

1956-1962           Pantycaws County Primary School, Carmarthenshire: Eleven Plus Certificate

NHS Appointments

2017-Present      Honorary Consultant Clinical Scientist, Cardiff and Vale University Health Board

2010-2017          Head of Medical Physics and Clinical Engineering, Cardiff and Vale University Health Board

2003-2010          Consultant Clinical Scientist and Head of Medical Physics, Cardiff and Vale University Health Board

1995-2003           Consultant Medical Physicist, Cardiff and Vale NHS Trust

1984-1995           Principal Medical Physicist, University Hospital of Wales Healthcare NHS Trust

1979-1984           Senior Medical Physicist, South Glamorgan Health Authority

1976-1979           Basic Grade Medical Physicist, South Glamorgan Health Authority

Honours and awards

2014                     Member of the Order of the British Empire (MBE) for services to the NHS in Wales and overseas

2009                     Honorary Member, Royal College of Radiologists (HonMRCR)

2005                     Honorary Certificate of Competence, Bone Densitometry Practitioner, National Osteoporosis Society

1983                     Medical Fellowship, Council of Europe

1972                     Marion Bradley Physics Prize, Jesus College, Oxford

1967                     Carmarthenshire Schools Representative, London Youth Science Fortnight

Professional memberships

2013                     Fellow, Society for Radiological Protection (FSRP)

2008                     Chartered Radiation Protection Professional, Society for Radiological Protection (CRadP)

2004                     Chartered Scientist, Science Council (CSci)

2002                     Registered Clinical Scientist, Health and Care Professions Council

1994                     Fellow, Institute of Physics (FInstP)

1991                     Cert. of Competence, Radiation Protection Adviser, Institution of Physics & Engineering in Med. & Biol.

1990                     Fellow, Institute of Physics and Engineering in Medicine (FIPEM)

1985                     Chartered Physicist, Institute of Physics (CPhys)

Academic positions

2014                     External Examiner (PhD), University of Nottingham

2011-Present      Honorary Professor, School of Engineering, Cardiff University

2010                     External Examiner (MD), University of Colombo, Sri Lanka

2009-2013          Visiting Lecturer (BSc), University of Swansea

2008-Present     International Adviser, SRM University, Chennai (Madras), India

2008-2009          Ext. Examiner (MRad/MMed), Univ. of Malaya, National Univ. of Malaysia and Science Univ. of Malaysia

2001-Present      Internal Examiner (PhD), Schools of Engineering and Medicine, Cardiff University

1996                     External Examiner (PhD), University of Swansea

1996                     External Examiner (MPhil), University of Glamorgan

1990-2016          Honorary Lecturer and Internal Examiner (BSc), School of Physics and Astronomy, Cardiff University

1989                     External Examiner (PhD), University of Leeds

















I am interested in co-supervising postgraduate research students in the following disciplines:

  • Medical radiation physics and engineering
  • Medical applications of radioactivity
  • Medical imaging physics and engineering
  • Nuclear medicine physics
  • Measurement of bone density and body composition

Current supervision

Andrew Fenwick

Research student

Past projects

I was a co-supervisor for the following Cardiff University PhD projects:

  • Identification and quantification of radioactive impurities in medical radionuclides - Ansam Al-Obaidi (awarded 2019)
  • A robust technique for the detection and quantification of abdominal aortic calcification using dual-energy x-ray absorptiometry - Karima Elmasri (awarded 2018)
  • Calibration of a scanning whole body counter for measurement of the activity of gamma emitting radionuclides in the human body – Thaer Al‑Musawi (awarded 2018)
  • Comparison of peripheral quantitative computed tomography and magnetic resonance imaging for tissue characterisation in the gastrocnemius muscle – Fahad Al-Gohani (awarded 2017)
  • Monte Carlo simulation applied to uncertainties in iodine-123 assay and thyroid uptake measurement - Matthew Talboys (awarded 2016)
  • The influence of accurate attenuation correction on quantitative gamma camera imaging - Helen Blundell (awarded 2013)
  • Effect of intra-abdominal fat on the accuracy of DXA lumbar spine bone mineral density measurement using DXA body composition measurements - Sarah Darlington (awarded 2013)
  • Measurement of caesium-137 in the human body using a whole body counter - Elkhadra Elessawi (awarded 2011)