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Clinical Leadership Team

Dr Stephen Davies : Medical Director

Dr Stephen Davies

Medical Director


Dr Stephen Davies MA FRCP FRCR was appointed as Medical Director at MEDICA in May 2013. He undertook pre-clinical studies at Cambridge (Sidney Sussex College) 1975-78 and his clinical studies at The Royal London 1978-1981. Having gained MRCP whilst Medical Registrar at Kings College Hospital he moved back to The Royal London for Radiology Training. He was appointed as a Consultant Radiologist in 1991 to Cwm Taf Health Board where he worked full-time until May 2013 and then part-time until his retirement in December 2016.

He was President of the British Institute of Radiology 2010-2012, UKRC President for 2008 and 2009 Congresses, Associate Dean and Head of Radiology School in Wales 2005-2011 and Quality Assurance Lead for Education for the Clinical Radiology Faculty at the RCR 2010-2012. He is a musculoskeletal radiologist and is an accredited Expert Witness. He is a Visiting Professor at the University of Glamorgan.

His radiological profile is as a musculoskeletal and general radiology. He has an interest in performance in doctors which stems from his time as Head of the Wales Radiology Training School.

As Medical Director at MEDICA Reporting he has responsibility for Clinical Governance and oversight of the Clinical Strategy. He is a Board Member and Responsible Officer.

In October 2015, he was awarded the Distinguished Service Medal by The British Institute of Radiology.

Dr Danya R Jeffrey : Associate Medical Director

Dr Danya R Jeffrey

Associate Medical Director


Dr Danya R Jeffrey MA BM BCh MRCP FRCR is a consultant radiologist working at Aneurin Bevan Health Board with subspecialty interests in musculoskeletal and thoracic imaging.

She qualified in Medicine from Oxford University in 1992 and trained on the Bristol Radiology Training Scheme. She spent a year working as a general radiologist in Vancouver before taking up her current post in South Wales.

She is an experienced medical appraiser, having carried out many appraisals both within the NHS and for MEDICA.  She undertakes appraisals for consultants from a wide range of specialties and is qualified to perform revalidation ready appraisals.

Dr Jeffrey is also an honorary clinical teacher at Cardiff University and Clinical Audit Lead for the Royal Gwent Hospital, Newport.  She has also worked as a reporting radiologist with MEDICA since 2012.

Dr Leighton Walker : Clinical NightHawk Lead

Dr Leighton Walker

Clinical NightHawk Lead


Dr Leighton Walker MA MBChB MRCP FRCR is a Consultant General Radiologist with a special interest in Neuroradiology working in Glasgow Royal Infirmary and Stobhill Ambulatory Care Hospital. His pre-clinical studies were at St Catharine's College Cambridge and clinical studies in Edinburgh.

Having gained MRCP whilst on medical rotation in Edinburgh, he moved to Newcastle for General Radiology Training and then returned to Scotland to undertake a two-year specialist Neuroradiology training in Glasgow. He was appointed to a Consultant Neuroradiologist post at the Institute of Neurological Sciences in Glasgow in 2004 and moved to the North-East sector of Glasgow in 2006.

His current radiological work focuses on stroke and multiple sclerosis and takes part in the unselected acute work of the sector. He has developed an interest in Ultrasound and is heavily involved in teaching the technique to trainees of all levels.

He is an experienced appraiser, having been part of the appraisal team since 2006. He has worked as a reporting Radiologist and NightHawk Radiologist with MEDICA since 2009.

Dr Maxine Murray : Clinical Audit Lead

Dr Maxine Murray

Clinical Audit Lead


Dr Maxine Murray MB ChB MRCP FRCR MA (Clin. Ed) AHEA is a Consultant Radiologist with subspecialty interest in chest and neuroradiology and is a member of the BSTI.

Dr Murray has a particular interest in teaching and gained an MA in Clinical Education in 2007. She was a sub-Dean and Honorary senior clinical lecturer at Brighton and Sussex Medical School from 2005-2012 and was appointed as a facilitator for Undergraduate teaching in 2017. She continues to examine and interview at BSMS on a regular basis.

In 2009, she was appointed Associate Clinical Professor at the American University of the Caribbean. Dr Murray gained accreditation as a Royal College of Physicians Educator in 2012 and an Associate Member of the Higher Education Academy. She has also been a Validator for the Radiology Integrated Training Initiative of the RCR and has trained as a Mentor and Appraiser.

In her spare time, she likes to play as much tennis as possible, breed boarder terriers as well as trying to keep three daughters on the straight and narrow.

Dr Murray has reported for MEDICA since 2014.

Clinical Advisory Leads

Dr Shekhar Banavali : Clinical Advisory Lead - Chest Radiology

Dr Shekhar Banavali

Clinical Advisory Lead - Chest Radiology


Dr Shekhar Banavali MBBS, MD, DNB, FRCR has been a consultant radiologist since 1998. Undertaking his initial training in India in the 1990s, he subsequently obtained a fellowship in the UK. Dr Banavali’s  sub-specialty interests include neuro and chest imaging and he has been a core member of local NHS Lung cancer and Lung nodule MDTs for several years, as well as being a member of British Society of Thoracic Imaging (BSTI).

Obtaining his qualifications from Kent, Surrey and Sussex Deanery Dr Banavali is also a qualified training supervisor.

Dr Banavali has been working with MEDICA since 2005 where he has been undertaking both reporting and auditing.

Dr Robert Bleehen : Clinical Advisory Lead - GI Radiology

Dr Robert Bleehen

Clinical Advisory Lead - GI Radiology


Dr Robert Bleehen MA MB BChir MRCP FRCR has been a full time substantive Consultant Radiologist at Llandough Hospital and University Hospital of Wales and an Honorary Clinical Teacher at Cardiff University since 2002. His main subspecialist interests are gastrointestinal and gynaecological cancer imaging and he supports the local colorectal and regional gynaecological cancer MDTs and performs bowel cancer screening with CT colonography for Bowel Screening Wales. He is a member of BSGAR and a member of the National Specialist Advisory Group for Gynaecological Cancers in Wales.

Dr Bleehen also serves as an elected Consultant representative on BMA Welsh Council and Welsh Consultants Committee, is chair of his Local Negotiating Committee and Vice Chair of the Welsh LNC Forum.

He has reported for MEDICA since April 2015 and is now Clinical Advisory Lead for GI  Radiology at MEDICA.

Dr Natasha Jefferson : Clinical Advisory Lead - Prostate Imaging

Dr Natasha Jefferson

Clinical Advisory Lead - Prostate Imaging


Dr Jefferson trained in Medicine at Oxford University, in General Medicine in Bristol to MRCP level and subsequently in Radiology on the Bristol Radiology training scheme. Significant periods of Registrar training were spent at the (then) Southmead Hospital where the majority of the Bristol Urological and Renal Transplant services were provided.

Dr Jefferson worked as an NHS consultant for Oxford University Hospitals NHS Trust and more recently at South Warwickshire NHS trust for a total of 10 years.  She now works predominantly for MEDICA having interests in Urological, Thoracic and Oncological imaging and in the appraisal of her Radiological colleagues.

Having completed multiple training courses in prostate MRI both in the UK and abroad, Dr Jefferson is experienced in reporting prostate MRI to contemporary international standards (PI-RADS v2) and understands the central role of prostate MRI in the diagnosis and management of patients with prostate cancer.  Aware that prostate MRI is a rapidly evolving field, particularly with increasing use of ultrasound-MRI fusion techniques, she will continue to develop MEDICA’s multiparametric prostate MRI services in accordance with the evolving uroradiological consensus.

Dr Jason Macdonald : Clinical Advisory Lead - Neuroradiology

Dr Jason Macdonald

Clinical Advisory Lead - Neuroradiology


Dr Jason Macdonald MBBS MRCP FRCR is a Consultant Neuroradiologist at University Hospital Southampton. Dr Macdonald qualified from the United Medical and Dental Schools of Guy's and St Thomas's Hospitals in 1997. After house officer posts, working in emergency medicine in Sydney and training in general medicine back in the UK, he passed MRCP in 2001.

In 2002 Dr Macdonald commenced radiology training in the Wessex Deanery based at Southampton General Hospital. After passing FRCR Dr Macdonald undertook a subspecialty diagnostic and interventional neuroradiology fellowship at the Wessex Neurological Centre in Southampton. After gaining CCT in 2008, he completed an additional interventional neuroradiology fellowship at Royal Prince Alfred Hospital, Sydney.

Dr Macdonald was appointed at University Hospital Southampton as a Consultant Diagnostic and Interventional Neuroradiologist in 2009. He has been lead consultant for neuroradiology and cross-sectional imaging since 2014.

Dr Macdonald’s practice encompasses all aspects of adult diagnostic neuroradiology. He has sub-speciality interests in the neurovascular imaging, endovascular and spinal interventional neuroradiology, the diagnosis and endovascular management of idiopathic intracranial hypertension, acute imaging in stroke and emergency mechanical thrombectomy.

Dr Macdonald is a member of the BSNR (British Society of Neuroradiologists) and the UKNG (UK Neurointerventional Group).

Dr Macdonald has reported for MEDICA since February 2016 and is now Clinical Advisory Lead for Neuroradiology at MEDICA.

Dr Jim Martin : Clinical Advisory Lead - DXA

Dr Jim Martin

Clinical Advisory Lead - DXA


Dr Jim Martin MD, FRCP, MBChB is a Consultant Rheumatologist, who graduated from Glasgow University in 1986. His clinical research in the field of osteoporosis, whilst working in Aberdeen, led to the award of an MD by the University of Glasgow in 1997. In 1998, he was appointed as consultant rheumatologist with a specialist interest in osteoporosis. His NHS practice, for Cwm Taf University Health Board, is based at the Royal Glamorgan Hospital, Llantrisant and Dewi Sant Hospital, Pontypridd. He undertakes private rheumatology consultant practice at Nuffield Health Cardiff and Vale Hospitals near Cardiff.

Dr Martin is the clinical lead for osteoporosis for Cwm Taf University Health Board, with weekly osteoporosis and metabolic bone clinics. He has clinical responsibility for the bone densitometry (DXA) unit at Dewi Sant Hospital.

In addition, Dr Martin is an Honorary Clinical Teacher for the University of Wales College of Medicine. He is a Fellow of the Royal College of Physicians (RCP), and is a member of both the RCP rheumatology specialty examination (SCE) question writing group and RCP rheumatology SCE exam board.

Dr Martin is a member of the following professional bodies: BMA (British Medical Association), BSR (British Society of Rheumatology), NOS (National Osteoporosis Society), WOAG (Welsh Osteoporosis Advisory Group), Welsh Rheumatology Specialist Advisory Group.

Dr Martin has reported for MEDICA since early 2016 and is now Clinical Advisory Lead for DXA at MEDICA.

Dr Saeed Mirsadraee : Clinical Advisory Lead - Cardiac Radiology

Dr Saeed Mirsadraee

Clinical Advisory Lead - Cardiac Radiology


Dr Saeed Mirsadraee MD PhD FRCPE FRCR is a Consultant Cardiothoracic Radiologist with special interest in acquired and congenital cardiac imaging. He trained in Radiology in Leeds training scheme and further developed his interest in cardiac imaging in Hull, Papworth, and UCLA. 

Dr Mirsadraee’s main area of research is in functional and perfusion imaging, and cardiac imaging. He has published multiple peer-reviewed papers, books and book chapters in the field of clinical imaging. He had been member of SIGN lung cancer guideline working group, and various RCR committees and is an associate editor of the Clinical Radiology. Dr Mirsadraee is a member of the SCMR, BSCI, and fellow of the SCCT.

Dr Saeed Mirsadraee is now Clinical Advisory Lead for Cardiac Radiology at MEDICA.

Dr Amaka Offiah : Clinical Advisory Lead - Paediatric Radiology

Dr Amaka Offiah

Clinical Advisory Lead - Paediatric Radiology


Dr Amaka C Offiah BSc, MBBS, MRCP, FRCR, PhD, FHEA is Reader in Paediatric Musculoskeletal Imaging and Honorary Consultant Radiologist at the University of Sheffield and Sheffield Children’s Hospital NHS Foundation Trust.

She has particular interest in inherited disorders of the skeleton and physical abuse. Her PhD thesis was on the optimisation of imaging methods for suspected physical abuse in children and she provides expert opinion to Her Majesty’s courts in cases of suspected abuse in children.

Dr Offiah has published over 70 papers, books and book chapters and given more than 100 invited national and international lectures. She is Convener of the Skeletal Dyplasia Group for Teaching and Research, Chairperson of the European Society of Pediatric Radiology Child Abuse Taskforce, Vice Chair of the Yorkshire and Humber (Sheffield) Research Ethics Committee and was the RCR 2013 Roentgen Professor – being the first female and the first paediatric radiologist to receive this award.

She has reported for MEDICA since 2014 and is now Clinical Advisory Lead for Paediatric Radiology.

Dr Paul Tallett : Clinical Advisory Lead - Reporting Radiographer Service

Dr Paul Tallett

Clinical Advisory Lead - Reporting Radiographer Service


Dr Paul Tallett MB BS FRCR has worked for MEDICA since 2016. He qualified in Medicine from Kings College London and Kings College Hospital in 1976, and after a period in Obstetrics and Gynaecology returned to Kings College Hospital to join the Radiology Training Scheme, gaining FRCR in 1982. After a year doing collaborative research with an industrial partner during which the team produced one of the first pulse wave duplex Doppler machines, he was appointed Consultant Radiologist with an interest in Ultrasound to Tunbridge Wells in 1983, where he worked full time until 2013, then part-time until he retired from NHS practice in 2016.

During his radiological working life he was Clinical Director and Chair of the Audit Committee. This lead to membership of the Clinical Management Group where he was Hon Secretary and Treasurer. He also took an interest in undergraduate radiology teaching and offered Mentorship to radiographers undertaking Appendicular, Chest and Specialist GI postgraduate courses.

Through his involvement with Radiographer Postgraduate Education, Paul now provides a role within MEDICA as Clinical Advisory Lead to Reporting Radiographers working for the company and real-time support/mentorship for clinical queries or second opinions that arise in their practice.

Dr Johnny Vlahos : Clinical Advisory Lead - GU Radiology

Dr Johnny Vlahos

Clinical Advisory Lead - GU Radiology


Dr Vlahos MBBS, BSc, FRCR is a consultant radiologist in the UK and a Diplomate with the American Board of Radiology. He graduated in 1993 with an MBBS from King's College, London, having previously attained a BSc in 1990 from the same establishment.

Following House Officer positions in medicine and surgery at King's College Hospital he took up posts of senior house officer (SHO) at King's College Hospital, Papworth Hospital and then Addenbrooke's Hospital, Cambridge. From 1996 to 2002 he was appointed a specialist registrar in radiology at St Bartholomew's and the Royal London Hospitals.

In 2001 Dr Vlahos took up a one-year Alwyn Bursary and clinical fellowship in chest and body imaging at St Bartholomew's and the Royal London Hospitals. He then took up a one-year fellowship in chest and body imaging at New York University USA in 2002. The following year he was appointed assistant professor and attending physician at New York University until 2007. He has been a consultant at St George's since 2007.

Dr Vlahos' research and teaching experience is extensive, highlights include setting up and directing the thoracic and body fellowships at St. George's Hospital in London and have writing curricula for education in both the UK and USA. He is a regular invited faculty lecturer year on year at a number of Radiological Societies including the Radiological Society of North America (RSNA), the American Roentgen Ray Society, the European Society of Radiology (ESR), UKRC, and Royal College of Radiology RCR meetings. Dr Vlahos sits on international research panels and research grant allocation committees as well as being a reviewer for numerous journals.

He has made many scientific presentations and authored many papers, chapters and original textbooks.

Dr Vlahos has a number of specialist clinical interests. These include cardiothoracic radiology, abdominal radiology and advanced CT applications such as 3D, quantitative techniques, dual energy CT and iterative reconstruction dose reduction.

Dr Vlahos has reported for MEDICA since April 2013 and is now Clinical Advisory Lead for GU Radiology at MEDICA.

Dr Sue Wilde : Clinical Advisory Lead - Head and Neck Radiology

Dr Sue Wilde

Clinical Advisory Lead - Head and Neck Radiology


Dr Sue Wilde, MBChB, MRCS, FRCR graduated from Manchester University Medical School in 1998. After doing stints in A&E and undertaking basic surgical training in Manchester she switched to radiology. Dr Wilde was a registrar in the Norwich training scheme and was appointed a Consultant Radiologist at King's Lynn in 2008.

Whilst in King's Lynn she was the College Tutor and departmental Clinical Governance Lead. In 2016 she returned back to Norwich as a consultant. Her main interests are head and neck radiology and general oncological imaging.

She has reported for MEDICA since 2012 and is now Clinical Advisory Lead for Head and Neck Radiology at MEDICA.

Dr David Wilson : Clinical Advisory Lead - Musculoskeletal Radiology

Dr David Wilson

Clinical Advisory Lead - Musculoskeletal Radiology


Dr David Wilson MBBS, BSc, MFSEM, FRCP, FRCR trained at Kings College and Kings College Hospital qualifying in medicine in 1976.  After training in general medicine in North Birmingham and Taunton he switched to radiology.  He arrived in Oxford in 1980 as a registrar and has never left.

His primary interest is in the application of modern imaging techniques to disorders of the locomotor system and spine intervention.  He has undertaken original work in the application of diagnostic ultrasound to joint, muscle, and soft tissue disease with particular attention to joint effusion and congenital dysplasia of the hip.  He has over 20 years of experience in vertebroplasty and is the author of publications on multicenter controlled trials on the treatment of insufficiency fractures. He has established innovative training courses in the UK in musculoskeletal ultrasound in Oxford and Bath.  He has considerable experience in all aspects of musculoskeletal imaging and is the Editor of a major textbook on MSK imaging.

As a former President of the British Society of Skeletal Radiologists and a previous Medical Director of the Nuffield Orthopaedic Centre he has wide clinical and research experience.

Dr Wilson commenced his two year term of office as President of the British Institute of Radiology (BIR) in September 2014 and currently runs an independent radiology practice undertaking NHS outsourced ultrasound, CT and conventional radiography at St Lukes Hospital Oxford.