Numerical Simulation for Interstitial Heating of Actual Neck Tumor Based on MRI Tomograms by Using a Coaxial-Slot Antenna

Kazuyuki SAITO  Hiroyuki YOSHIMURA  Koichi ITO  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E86-C   No.12   pp.2482-2487
Publication Date: 2003/12/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Recent Trends on Microwave and Millimeter Wave Application Technology)
Category: Medical Application
Keyword: 
interstitial microwave hyperthermia,  coaxial-slot antenna,  MRI tomogram,  FDTD,  temperature distribution,  

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Summary: 
Hyperthermia is one of the modalities for cancer treatment, utilizing the difference of thermal sensitivity between tumor and normal tissue. In this treatment, the tumor or target cancer cell is heated up to the therapeutic temperature between 42 and 45 without overheating the surrounding normal tissues. Particularly, the authors have been studying the coaxial-slot antenna for interstitial microwave hyperthermia. At that time, we analyzed the heating characteristics of the coaxial-slot antenna under the assumption that the human body is a homogeneous medium. In this paper, we analyzed the heating characteristics of the coaxial-slot antenna inside an actual neck tumor by using numerical calculations. The models of calculations consist of MRI tomograms of an actual patient. As a result of the calculations, we observed almost uniform temperature distributions inside the human body including the actual neck tumor, which are similar to the results obtained for a homogeneous medium.