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Experimental and Clinical Radiofrequency Ablation: Proposal for Standardized Description of Coagulation Size and Geometry

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Annals of Surgical Oncology Aims and scope Submit manuscript

Abstract

Background

Radiofrequency (RF) ablation is used to obtain local control of unresectable tumors in liver, kidney, prostate, and other organs. Accurate data on expected size and geometry of coagulation zones are essential for physicians to prevent collateral damage and local tumor recurrence. The aim of this study was to develop a standardized terminology to describe the size and geometry of these zones for experimental and clinical RF.

Methods

In a first step, the essential geometric parameters to accurately describe the coagulation zones and the spatial relationship between the coagulation zones and the electrodes were defined. In a second step, standard terms were assigned to each parameter.

Results

The proposed terms for single-electrode RF ablation include axial diameter, front margin, coagulation center, maximal and minimal radius, maximal and minimal transverse diameter, ellipticity index, and regularity index. In addition a subjective description of the general shape and regularity is recommended.

Conclusions

Adoption of the proposed standardized description method may help to fill in the many gaps in our current knowledge of the size and geometry of RF coagulation zones.

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Acknowledgment

The authors thank Marie-Bernadette Jacqmain and Christian Deneffe for the illustrations.

Author information

Authors and Affiliations

  1. Department of Radiology, Gasthuisberg University Hospital, Herestraat 49, 3000, Leuven, Belgium

    Stefaan Mulier MD, Yicheng Ni MD, PhD & Guy Marchal MD, PhD

  2. Department of Surgery, Rikshospitalet University Hospital, Sognsvannsveien 20, 0027, Oslo, Norway

    Lars Frich MD

  3. Unity of Liver Surgery and Liver Transplantation, Bellvitge University Hospital, Feixa Llarga, sn, 08907 Hospitalet de Llobregat, Barcelona, Spain

    Fernando Burdio MD

  4. Department of Diagnostic and Interventional Radiology, Centre Hospitalier Universitaire Vaudois, Rue du Bugnon 46, 1011, Lausanne, Switzerland

    Alban L. Denys MD

  5. Department of Radiology, Mont-Godinne University Hospital, Avenue du Dr. Thérasse 1, 5530, Yvoir, Belgium

    Jean-François De Wispelaere MD & Marc Lacrosse MD

  6. Central Service of Radiology and Medical Imaging, Hôtel Dieu, University Hospital of Nantes, Place Alexis Ricordeau 1, 44093, Nantes Cedex 01, France

    Benoît Dupas MD, PhD

  7. Department of Liver and Pancreas Surgery, Imperial College London, Hammersmith Hospital, Du Cane Road, W12 0NN, London, UK

    Nagy Habib MD, FRCS

  8. Biomedical Engineer, 5733 Pond Drive, Shoreview, Minnesota, 55126, USA

    Michael Hoey PhD

  9. Department of Surgery, Academic Medical Center, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands

    Maarten C. Jansen MD & Thomas M. van Gulik MD

  10. Division of Endourology, Laparoscopy and Minimally Invasive Surgery, University of Miami School of Medicine, Professional Arts Center, 1150 NW 14th Street, Suite 309, Miami, Florida, 33101, USA

    Raymond Leveillee MD

  11. Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China

    Yi Miao MD, PhD

  12. Biomedical Engineer, 8140 Lake Elmo Avenue, Stillwater, Minnesota, 55082, USA

    Peter Mulier

  13. Department of General Surgery, University Hospital of Strasbourg, Place de l’Hôpital, 67091, Strasbourg Cedex, France

    Didier Mutter MD, PhD

  14. Department of Surgery, University of Hong Kong, Queen Mary Hospital, 102 Pofulam Road, Hong Kong, 852, China

    Kelvin K. Ng MBBS, PhD, FRCSEd (Gen)

  15. Unit of Bilio-pancreatic Surgery, Ospedale San Paolo, University of Milan, via A. di Rudinì 8, 20142, Milan, Italy

    Roberto Santambrogio MD

  16. Department of Visceral and Vascular Surgery, University of Cologne, Joseph Stelzmann Strasse 9, 50924, Cologne, Germany

    Dirk Stippel MD

  17. Department of Digestive and Cardiovascular Medicine, Tokushima University School of Medicine, (3-18-15) Kuramoto-cho, Tokushima, 770-8503, Japan

    Katsuyoshi Tamaki MD

  18. Department of Surgery, Mont-Godinne University Hospital, Avenue du Dr. Thérasse 1, 5530, Yvoir, Belgium

    Luc Michel MD, FACS

Authors
  1. Stefaan Mulier MD
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  2. Yicheng Ni MD, PhD
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  3. Lars Frich MD
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  4. Fernando Burdio MD
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  5. Alban L. Denys MD
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  6. Jean-François De Wispelaere MD
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  7. Benoît Dupas MD, PhD
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  8. Nagy Habib MD, FRCS
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  9. Michael Hoey PhD
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  10. Maarten C. Jansen MD
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  11. Marc Lacrosse MD
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  12. Raymond Leveillee MD
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  13. Yi Miao MD, PhD
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  14. Peter Mulier
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  15. Didier Mutter MD, PhD
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  16. Kelvin K. Ng MBBS, PhD, FRCSEd (Gen)
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  22. Luc Michel MD, FACS
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Corresponding author

Correspondence to Luc Michel MD, FACS.

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Mulier, S., Ni, Y., Frich, L. et al. Experimental and Clinical Radiofrequency Ablation: Proposal for Standardized Description of Coagulation Size and Geometry. Ann Surg Oncol 14, 1381–1396 (2007). https://doi.org/10.1245/s10434-006-9033-9

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  • DOI: https://doi.org/10.1245/s10434-006-9033-9

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