WFNMB

The Federation · Governance

Led by its members.

The Federation is directed by officers elected from its member societies, together with a Governing Council and standing committees.

Five members of the WFNMB executive standing together in front of the Federation’s banner.

The Executive

Officers serve a four-year term aligned to the World Congress cycle. The Board meets between congresses to carry the Federation's work forward (advocacy, education, standards and the congress itself) and reports to the General Assembly of member societies.

~100

Member societies represented

4

World regions represented

2018

Statutes · current

The officers

Leadership of the Federation

  • Portrait of Savvas Frangos, President of the WFNMB.PresidentSavvas Frangos

    Dr Savvas Frangos was born in Limassol, Cyprus. He studied medicine in Berlin, Germany, took his first steps in nuclear medicine there, and completed his specialization in Thessaloniki, Greece.

    Portrait of Savvas Frangos, President of the WFNMB.
    President

    Savvas Frangos

    Dr Savvas Frangos was born in Limassol, Cyprus. He studied medicine in Berlin, Germany, took his first steps in nuclear medicine there, and completed his specialization in Thessaloniki, Greece.

    After board certification he established the first private department of nuclear medicine in Cyprus, and he was a founder and the first President of the Cyprus Society of Nuclear Medicine. A Fellow of the European Board of Nuclear Medicine, he served for many years as an examiner. He currently works in the Nuclear Medicine Department and runs the Thyroid Clinic at the Bank of Cyprus Oncology Centre. He has held senior roles including at the EANM, as Secretary and Treasurer of the Nuclear Medicine Section of the UEMS, and as Treasurer of the WFNMB. He is President of the World Federation of Nuclear Medicine and Biology.

  • Portrait of Gopinath Gnanasegaran, President-Elect of the WFNMB.President-ElectGopinath Gnanasegaran

    Dr Gopinath Gnanasegaran is a consultant in Nuclear Medicine at the Royal Free London NHS Foundation Trust. He graduated from Mysore Medical College and holds an MSc in Nuclear Medicine from King's College London and an MD from University College London.

    Portrait of Gopinath Gnanasegaran, President-Elect of the WFNMB.
    President-Elect

    Gopinath Gnanasegaran

    Dr Gopinath Gnanasegaran is a consultant in Nuclear Medicine at the Royal Free London NHS Foundation Trust. He graduated from Mysore Medical College and holds an MSc in Nuclear Medicine from King's College London and an MD from University College London.

    A Fellow of the Royal College of Physicians, Dr Gnanasegaran specialises in diagnostic imaging, including PET-CT, SPECT-CT, and radionuclide therapies. He is an Honorary Associate Professor at University College London and has published over 140 papers and several books. In 2019, he received the British Institute of Radiology's Longstanding Educational Contributor award for his dedication to Nuclear Medicine education. He was the inaugural education lead for the British Nuclear Medicine Society. Dr Gnanasegaran has served on the European Association of Nuclear Medicine (EANM) Bone and Oncology Committees and currently serves on the EANM Young Professionals Council (YPC). He is a former Secretary-General of the World Federation of Nuclear Medicine and Biology (WFNMB) and currently serves on the Global Diagnostics Coalition (GDC) Working Group 2 (World Health Organisation): Learning and Knowledge Sharing.

  • Portrait of John Prior, Treasurer of the WFNMB.TreasurerJohn Prior

    Professor John O. Prior was born in Switzerland and holds dual training in engineering and medicine, with an MSc from ETH Zurich, a PhD in Biomedical Engineering from UT Southwestern Medical Center in Dallas, and medical degrees from the University of Lausanne. He served as Visiting Professor at UCLA.

    Portrait of John Prior, Treasurer of the WFNMB.
    Treasurer

    John Prior

    Professor John O. Prior was born in Switzerland and holds dual training in engineering and medicine, with an MSc from ETH Zurich, a PhD in Biomedical Engineering from UT Southwestern Medical Center in Dallas, and medical degrees from the University of Lausanne. He served as Visiting Professor at UCLA.

    Since 2010 he has been Professor and Head of Nuclear Medicine and Molecular Imaging at Lausanne University Hospital (CHUV) and has authored over 350 publications. He is President of the Swiss Society of Nuclear Medicine and, since 2024, President of the Section and Board of Nuclear Medicine at the European Union of Medical Specialists (UEMS). He serves as Treasurer of the World Federation of Nuclear Medicine and Biology for 2025 to 2027 and as the WFNMB Focal Point for technical collaboration with the WHO. He contributed to the WHA78.13 resolution on strengthening medical imaging capacity, adopted at the 78th World Health Assembly in 2025.

  • Portrait of Gisela Estrada, Secretary General of the WFNMB.General SecretaryGisela Estrada

    Dr Gisela Estrada was born in Uruapan, Michoacan, Mexico. She obtained her medical degree and completed her nuclear medicine residency in Mexico City, and was the first resident in her country to train in PET/CT at UNAM.

    Portrait of Gisela Estrada, Secretary General of the WFNMB.
    General Secretary

    Gisela Estrada

    Dr Gisela Estrada was born in Uruapan, Michoacan, Mexico. She obtained her medical degree and completed her nuclear medicine residency in Mexico City, and was the first resident in her country to train in PET/CT at UNAM.

    Her PhD examined integrins in breast and glioblastoma tumours using micro SPECT/PET/CT, giving her preclinical and clinical experience alongside cyclotron and radiopharmacy teams. She has served as an editor of two PET/CT books and as an author of book chapters and articles. She has been President of the Mexican Nuclear Medicine Federation, President of the Mexican Board of Nuclear Medicine, and President of ALASBIMN, the Latin American association of nuclear medicine and biology societies. She is passionate about education across Latin America and worldwide, and is General Secretary of the World Federation of Nuclear Medicine and Biology.

Executive Board & representatives

The regional federations, partner societies and representatives

  • Portrait of Lizette Louw, Immediate Past-President of the WFNMB.Immediate Past-PresidentLizette Louw

    Dr Lizette Louw was born and raised in Pretoria, South Africa, and obtained her medical degree at the University of Pretoria. After completing residency training in internal medicine at the University of the Witwatersrand she moved into nuclear medicine.

    Portrait of Lizette Louw, Immediate Past-President of the WFNMB.
    Immediate Past-President

    Lizette Louw

    Dr Lizette Louw was born and raised in Pretoria, South Africa, and obtained her medical degree at the University of Pretoria. After completing residency training in internal medicine at the University of the Witwatersrand she moved into nuclear medicine.

    She has held directorship roles from early in her career and has served on various professional bodies since 2014. She is a senior specialist at the University of the Witwatersrand, the largest academic nuclear medicine unit in South Africa, where she gives regular educational talks to raise awareness of the field. A committed advocate for nuclear medicine education and for equal opportunities and support for women in the profession, she is the Immediate Past-President of the World Federation of Nuclear Medicine and Biology.

  • Portrait of Heather JacenePresident SNMMIHeather JaceneSociety of Nuclear Medicine and Molecular Imaging

    Bio pending from WFNMB office.

  • Portrait of Paola Anna Erba, President of the EANM.President EANMPaola Anna ErbaEuropean Association of Nuclear Medicine

    Bio pending from WFNMB office.

  • Portrait of Keon Wook Kang, President of the ARCCNM.President ARCCNMKeon Wook KangAsian Regional Cooperative Council for Nuclear Medicine

    Bio pending from WFNMB office.

  • Portrait of Akram Al-Ibraheem, President of the AOFNMB.President AOFNMBAkram Al-IbraheemAsia-Oceania Federation of Nuclear Medicine and Biology

    Bio pending from WFNMB office.

  • Portrait of Gisela EstradaPresident ALASBIMNGisela EstradaLatin American Association of Societies of Biology and Nuclear Medicine

    Bio pending from WFNMB office.

  • Portrait of Salah Eddine Bouyoucef, President of the AANM.President AANMSalah Eddine BouyoucefAfrica Association of Nuclear Medicine

    Bio pending from WFNMB office.

  • Portrait of Roslyn Francis, President of the ANZSNM.President ANZSNMRoslyn FrancisAustralian and New Zealand Society of Nuclear Medicine

    Bio pending from WFNMB office.

  • Portrait of Batool Al Balooshi, President of the ARSNM.President ARSNMBatool Al BalooshiArab Society of Nuclear Medicine

    Bio pending from WFNMB office.

  • Portrait of Diana Paez, the WFNMB representative to the IAEA.Representative IAEADiana PaezInternational Atomic Energy Agency

    Bio pending from WFNMB office.

  • Portrait of John PriorWFNMB focal point for technical collaboration with WHOJohn PriorWorld Health Organisation

    Bio pending from WFNMB office.

  • Portrait of Patricia Bernal, President of the 2026 World Congress.2026 Congress PresidentPatricia Bernal

    Bio pending from WFNMB office.

Maintained by the Federation office in the admin, in the order set there. Regional and partner-society presidents and the representatives of the IAEA, the WHO and the World Congress sit on the Governing Council alongside the officers.

The officers of the Federation carry its work forward between congresses (advocacy, education, standards and the World Congress itself) and report to the General Assembly of member societies. The Governing Council is drawn from the leadership of the member societies, with representatives of partner bodies such as the International Atomic Energy Agency.

The current officers are shown above. Regional and partner societies, among them SNMMI, EANM, AOFNMB, AANM, ANZSNM and ARCCNM, are represented alongside them, and the executive office in Vienna maintains the full directory.

Standing committees

How the work is organised

  • Education

    Directs the education programme and the hub (open access and the society-issued curriculum) with a standing brief for developing regions.

  • Congress

    Oversees host selection and the scientific programme of the quadrennial World Congress.

  • Standards & Practice

    Maintains the global forum for standards of training, practice and evidence-based use of the specialty.

  • Membership

    Admits and supports national societies and regional federations, and maintains the directory.

  • Finance & Audit

    Stewards the Federation's finances and reports to the General Assembly.