Abstract #1644
MR Compatible Electrode for RF Hyperthermia with Capacitive Coupling: Feasibility Demonstration
Han-Joong Kim 1 , Suchit Kumar 1 , Jong-Hoon Han 1 , Jong-Min Kim 1 , Jun-Sik Yoon 1 , Seung-Koo Lee 2 , Chulhyun Lee 3 , and Chang-Hyun Oh 1
1
Korea University, Seoul, Seoul, Korea,
2
Unionmedical
Corporation, Uijeongbu, Gyeonggi-do, Korea,
3
The
MRI Team, Korea Basic Science Institute, Cheongju,
Chungcheongbuk-do, Korea
The radio-frequency hyperthermia treatment with
capacitive driving is now emerging as a noninvasive
cancer treatment method. The tumorous tissue having
higher ionic concentration have higher electric
conductivity than the normal tissue. When the RF
electric field is applied, the more electric current is
drawn by the tumor cell resulting in the increased
temperature around the tumor. This process could be
carried out more safely with accuracy if we can monitor
the treatment process including the temperature. We have
studied the technical feasibility of developing MR
compatible electrodes which can be used for RF
hyperthermia in the MR systems with proper switching
mechanism without affecting MR signal reception. A
prototype animal 13.56 MHz capacitive RF hyperthermia
system was operated with MR image acquisition capability
using a 3.0-T MRI system (Achieva 3.0 T, Philips). We
have designed, constructed, and tested experimentally a
new RF electrode with switching resonant circuits
working at 13.56 MHz without affecting the MR image
acquisition at 128 MHz.
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