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Impact of Parameters of Radiofrequency Coagulation on Volume of Stereotactic Lesion inPallidotomy and Thalamotomy
Nara Medical University, Kashihara , Japan.
Umeå University.
Linköping University, Department of Biomedical Engineering, Biomedical Instrumentation. Linköping University, The Institute of Technology.
Umeå University.
2012 (English)In: Stereotactic and Functional Neurosurgery, ISSN 1011-6125, E-ISSN 1423-0372, Vol. 90, no 5, 307-315 p.Article in journal (Refereed) Published
Abstract [en]

Background: One of the many reasons why lesional surgery for movement disorders has been more or less abandoned may have been the difficulty in predicting the shape and size of the stereotactic radiofrequency (RF) lesion. Objectives: To analyse the contribution of various RF coagulation parameters towards the volume of pallidotomies and thalamotomies. Methods: The relationship between temperature of coagulation, length of coagulated area and duration of coagulation on the one hand, and lesion volume on the other was retrospectively evaluated. Lesion diameters were measured on stereotactic thin-slice CT and MRI scans, and volumes of lesions were calculated concerning 36 pallidotomies and 14 thalamotomies in 46 patients who were operated using the same RF generator and same RF electrode. Results: The coagulation temperature, length of coagulated area and duration of coagulation were all correlated to the lesion volume. However, for a given length of coagulated area, the lesion´s size was most strongly influenced by the temperature. Despite this clear correlation, and the relatively homogenous coagulation parameters, the lesions’ volumes were markedly scattered. Conclusions: The volume of the stereotactic RF lesions could be correlated with the coagulation parameters, especially the temperature, at a group level, but could not be predicted in individual patients based solely on the RF coagulation parameters.

Place, publisher, year, edition, pages
Basel: S. Karger, 2012. Vol. 90, no 5, 307-315 p.
Keyword [en]
Pallidotomy, Thalamotomy, Radiofrequency, Parkinson’s disease
National Category
URN: urn:nbn:se:liu:diva-81379DOI: 10.1159/000338249ISI: 000310356900004OAI: diva2:552092

funding agencies|University Hospital of Umea||Foundation for Clinical Neuroscience at the University Hospital of Umea||Swedish Governmental Agency for Innovation Systems||Swedish Foundation for Strategic Research||Swedish Research Council|311-2006-7661|UK Parkinson Appeal||UK Monument Trust||Edmond J. Safra philanthropic foundation||

Available from: 2012-09-12 Created: 2012-09-12 Last updated: 2012-12-07

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Wårdell, Karin
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