A floating sleeve antenna yields localized hepatic microwave ablation.
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. Index Terms-Ablation, coaxial aperture antennas, finite element methods, floating sleeve, microwave heating.
Yang
Deshan
D
Department of Electrical and Computer Engineering, University of Wisconsin, Madison, WI 53706 USA.
Bertram
John M
JM
Converse
Mark C
MC
O'Rourke
Ann P
AP
Webster
John G
JG
Hagness
Susan C
SC
Will
James A
JA
Mahvi
David M
DM
D000818:Animals; D017115:Catheter Ablation / Q000295:instrumentation* / Q000379:methods; D002417:Cattle; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006498:Hepatectomy / Q000295:instrumentation* / Q000379:methods; D066298:In Vitro Techniques; D008099:Liver / Q000473:pathology* / Q000601:surgery*; D008872:Microwaves / Q000627:therapeutic use*