A floating sleeve antenna yields localized hepatic microwave ablation

• Published in: IEEE transactions on biomedical engineering Vol. 53; no. 3; pp. 533 - 537
• Main Authors: Deshan Yang, Bertram, J.M., Converse, M.C., O'Rourke, A.P., Webster, J.G., Hagness, S.C., Will, J.A., Mahvi, D.M.
• Format: Journal Article
• Language: English
• Published: United States IEEE 01.03.2006; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Ablation; Animals; Antenna feeds; Biomedical engineering; Catheter Ablation - instrumentation; Catheter Ablation - methods; Cattle; coaxial aperture antennas; Coaxial components; Computer-Aided Design; Conductors; Dipole antennas; Electromagnetic heating; Equipment Design; Equipment Failure Analysis; finite element methods; floating sleeve; Hepatectomy - instrumentation; Hepatectomy - methods; In Vitro Techniques; Liver - pathology; Liver - surgery; Microwave antennas; Microwave devices; microwave heating; Microwaves - therapeutic use; Neoplasms; Slot antennas
• ISSN: 0018-9294; 1558-2531; 1558-2531
• DOI: 10.1109/TBME.2005.869794

We report a novel coaxial antenna for hepatic microwave ablation. This device uses a floating sleeve, that is, a metal conductor electrically isolated from the outer connector of the antenna coaxial body, to achieve a highly localized specific absorption rate pattern that is independent of insertion depth. This floating sleeve coaxial dipole antenna has low power reflection in the 2.4-GHz IMS band. Ex vivo experiments confirm our numerical simulation results.