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Published on: April 30, 2018
Noninvasive thermometry in a reentrant resonant cavity applicator
Yasutoshi Ishihara1, Yuichiro Endo, Hiroshi Ohwada
1Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan. ishihara@vos.nagaokaut.ac.jp
Summary
A new noninvasive thermometry method uses electrical field phase changes in a resonant cavity to monitor hyperthermia treatment temperature changes. This technique offers a simpler alternative to MRI for internal body temperature monitoring.
Area of Science:
- Biomedical Engineering
- Medical Physics
- Electromagnetics
Background:
- Hyperthermia treatment effectiveness is limited by accurate temperature monitoring.
- Current noninvasive temperature monitoring methods, like MRI, often require large, complex equipment.
Purpose of the Study:
- To propose a novel, noninvasive thermometry method for improved hyperthermia treatment.
- To develop a technique for reconstructing internal temperature distributions.
Main Methods:
- Utilizing the phase change of an electrical field within a resonant cavity, which correlates with temperature variations.
- Collecting line-integrated phase change data by rotating a cavity resonator.
- Reconstructing the temperature distribution using a back-projection algorithm and finite difference time domain (FDTD) numerical analysis.
Main Results:
- Demonstrated a method for noninvasively measuring temperature changes inside a resonant cavity.
- Numerical analysis using FDTD indicated the feasibility of the proposed thermometric approach.
- The method shows potential for monitoring temperature changes within the body without large setups.
Conclusions:
- The proposed noninvasive thermometry method, based on electrical field phase changes, is feasible for monitoring temperature during hyperthermia.
- This technique offers a potentially simpler and more accessible alternative to MRI for internal temperature monitoring.
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