Focused Magnetic Resonance Coupling Coils for Electromagnetic Therapy Applications.
This paper presents the design and construction of a pair of figure-of-eight coils, coupled by magnetic resonance coupling (MRC), which could generate (150 V/m per Ampere) electric field at the focal points for electromagnetic therapy related applications. The E field generated at the targeted site would be significantly enhanced under the same amount of current flowing through the MRC figure-of-eight coils compared to normal coils, due to the superposition of E field contributed by the coils. Furthermore, the MRC figure-of-eight coil is designed and the results are verified in theory, simulation, and experiments. In the ex vivo tissue measurement, 35% current and 82% ohmic power improvements were observed. Since it can enhance the current and ohmic power, the MRC figure-of-eight coils are promising solutions for electromagnetic therapy applications. The potential applications of the coils include noninvasive radio frequency (RF) stimulation, thermoacoustic imaging, electromagnetic field therapies, and RF ablation, etc.
School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore.
Sai Ho
SH
Yeung
School of Electrical and Electronic Engineering, Nanyang Technological University.
Raunaq
R
Pradhan
School of Electrical and Electronic Engineering, Nanyang Technological University.
Xiaohua
X
Feng
School of Electrical and Electronic Engineering, Nanyang Technological University.
Yuanjin
Y
Zheng
D000818:Animals; D004574:Electromagnetic Fields; D004867:Equipment Design; D055909:Magnetic Field Therapy / Q000295:instrumentation*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D008954:Models, Biological; D009132:Muscles / Q000502:physiology; D013552:Swine