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Proceedings Paper

Mapping and monitoring of ablative therapy for improved results
Author(s): David E. Gustafson; Desikachari Nadadur; Gary W. Dalmadge; Morgan Nields
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Paper Abstract

We demonstrate a method which incorporates state-of-the-art x-ray imaging with novel thermal therapy monitoring to enable improved minimally invasive thermal-therapy delivery for benign or malignant tumors. Thermal ablative techniques including RFA, microwave, and laser ablation are gaining acceptance. Incomplete treatments are common since there is no reliable method to monitor treatment zones during ablation. Treatment that doesn't encompass the entire tumor results in recurrence usually within one year. We describe a method to monitor tumor ablation zones during ablations performed under CT image guidance. This method allows the operator to predict necrosis while avoiding injury to critical structures. We validated the model using tissue and animal experiments. We also report on initial clinical results from patients receiving RFA treatments for primary or metastatic lesions. Following CT image-guidance to position RFA devices in a patient's tumor, intraprocedural CT data was acquired and processed offline. In this paper we describe the methods to monitor and provide feedback on the ablation during the study. By demonstrating the creation of accurate thermal maps in tissue and animal models, and extending this in preliminary treatment of tumors in patients, we hope to encourage the broader adoption of these methods by improving both safety and efficacy.

Paper Details

Date Published: 9 February 2007
PDF: 13 pages
Proc. SPIE 6440, Thermal Treatment of Tissue: Energy Delivery and Assessment IV, 644005 (9 February 2007); doi: 10.1117/12.700545
Show Author Affiliations
David E. Gustafson, Abla-tx Inc. (United States)
Desikachari Nadadur, Abla-tx Inc. (United States)
Gary W. Dalmadge, Abla-tx Inc. (United States)
Morgan Nields, Abla-tx Inc. (United States)

Published in SPIE Proceedings Vol. 6440:
Thermal Treatment of Tissue: Energy Delivery and Assessment IV
Thomas P. Ryan, Editor(s)

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