PMID- 19163683
OWN - NLM
STAT- MEDLINE
DCOM- 20090511
LR  - 20200928
IS  - 2375-7477 (Print)
IS  - 2375-7477 (Linking)
VI  - 2008
DP  - 2008
TI  - Development of automatic impedance matching system for hyperthermia treatment 
      using resonant cavity applicator.
PG  - 4376-9
LID - 10.1109/IEMBS.2008.4650180 [doi]
AB  - In this paper, we discuss a new system to make impedance matching automatically 
      for a re-entrant resonant cavity applicator for brain tumor hyperthermia 
      treatment non-invasively. We have already discussed about the effectiveness of 
      the heating method using manual type impedance matching controller, with 
      experiments of heating an agar phantom and computer simulations. However, it 
      becomes difficult to perform an accurate impedance matching as resonant frequency 
      becomes high. Here, in order to make a more accurate impedance matching, we 
      developed the automatic impedance matching system (AIMS). We noticed that the 
      reflected power was generated when the impedance matching was not complete. In 
      this system, therefore, to reduce the reflected power fed back, the stepping 
      motor to turn the dial of variable capacitors is controlled by developed 
      software. To evaluate the developed AIMS, the experiments of heating the agar 
      phantom were performed. From these results, we found that the temperature rise of 
      the agar phantom by using AIMS was about 180% of using manual type controller 
      under the same heating condition. It was found that the proposed system was very 
      effective for hyperthermia treatment using resonant cavity applicator even when 
      the resonant frequency was high.
FAU - Shindo, Y
AU  - Shindo Y
AD  - Department of Mechanical Engineering Informatics, Meiji University, Kawasaki, 
      Japan.
FAU - Kato, K
AU  - Kato K
FAU - Hirashima, T
AU  - Hirashima T
FAU - Yabuhara, T
AU  - Yabuhara T
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Annu Int Conf IEEE Eng Med Biol Soc
JT  - Annual International Conference of the IEEE Engineering in Medicine and Biology 
      Society. IEEE Engineering in Medicine and Biology Society. Annual International 
      Conference
JID - 101763872
RN  - 9002-18-0 (Agar)
SB  - IM
MH  - Agar/chemistry
MH  - Algorithms
MH  - Automation
MH  - Brain Neoplasms/*therapy
MH  - Computer Systems
MH  - Computers
MH  - Equipment Design
MH  - Humans
MH  - *Hyperthermia, Induced
MH  - Internet
MH  - Phantoms, Imaging
MH  - Signal Processing, Computer-Assisted
MH  - Software
MH  - Temperature
MH  - Thermodynamics
EDAT- 2009/01/24 09:00
MHDA- 2009/05/12 09:00
CRDT- 2009/01/24 09:00
PHST- 2009/01/24 09:00 [entrez]
PHST- 2009/01/24 09:00 [pubmed]
PHST- 2009/05/12 09:00 [medline]
AID - 10.1109/IEMBS.2008.4650180 [doi]
PST - ppublish
SO  - Annu Int Conf IEEE Eng Med Biol Soc. 2008;2008:4376-9. doi: 
      10.1109/IEMBS.2008.4650180.