IEEE 杰出讲座通知 演讲人：Koichi ITO（伊藤公一）教授（IEEE Fellow, IEEE AP-S 杰出演讲人； 日本千叶大学医学工程交叉学科研究中心主任） 地 点：东南大学（四牌楼校区）李文政楼六楼 612会议室 日 期：2009年12月2日（三）上、下午 讲座一：Microwave Antennas for Medical Applications [上午10:00-11:30] Abstract: In recent years, various types of medical applications of antennas have widely been investigated and reported. Typical recent applications are: (1) Information transmission: - RFID (Radio Frequency Identification) / Wearable or Implantable monitor - Wireless telemedicine / Mobile health system (2) Diagnosis: - MRI (Magnetic Resonance Imaging) / fMRI - Microwave CT (Computed Tomography) / Radiometry (3) Treatment: - Thermal therapy (Hyperthermia, ablation, etc) - Microwave knife In this presentation, three different types of antennas which have been studied in our laboratory are introduced. Firstly, a pretty small antenna for an implantable monitoring system is presented. A cavity slot antenna is a good candidate for such a system. Some numerical and experimental characteristics of the antenna are demonstrated. Secondly, some different antennas or “RF coils” for MRI systems are introduced. In addition, SAR (specific absorption rate) distributions in the abdomen of a pregnant woman generated in a bird cage coil are illustrated. Finally, after a brief overview of thermal therapy and microwave heating, coaxial-slot antennas and array applicators composed of several coaxial-slot antennas for minimally invasive microwave thermal therapies are introduced. Then a few results of actual clinical trials by use of coaxial-slot antennas are demonstrated from a technical point of view. Other therapeutic applications of the coaxial-slot antennas such as hyperthermic treatment for brain tumor and intracavitary hyperthermia for bile duct carcinoma are introduced.
讲座二：Phantoms for Evaluation of Interactions between Antennas and the Human Body [下午14:30-16:00] Abstract: Recently, many researches have been done on the interactions between the human body and electromagnetic (EM) waves radiated from antennas for mobile terminals or other equipments. The "interactions" mean two ways: an influence of the human body on the performance of the antenna and an influence of EM waves on the human body. Such interactions are estimated by numerical simulation and/or experimental evaluation. In this presentation, firstly, various types of numerical phantoms or human models which are used for theoretical analysis and computational simulation are introduced. Canonical phantoms such as sphere or cube have been mainly used for EM dosimetry inside the human head. In order to estimate the performance of the antenna close to the human body in the actual situation or SAR (Specific Absorption Rate) distribution inside the human body, it is sometimes necessary to use realistic numerical phantoms which are composed of many small voxels. On the contrary, tissue-equivalent liquid, gel, semi-hard or solid phantoms are usually used for experimental evaluation. Then some different experimental phantoms are introduced and compared. There are two typical ways to evaluate SAR distributions by using experimental phantoms: the “electric-field method” with a liquid phantom and the “thermographic method” with a semi-hard or solid phantom. Finally, this presentation introduces some examples of "new" solid phantoms including a UWB phantom and a torso phantom which are used for the study on body-centric wireless communications.
Koichi Ito, Professor, D.E. Director, Research Center for Frontier Medical Engineering Head, Department of Medical System Engineering Chiba University 1-33 Yayoi-cho, Inage-ku, Chiba-shi, 263-8522 Japan E-mail: ito.koichi@faculty.chiba-u.jp / k-ito@ieee.org
Biography
Koichi Ito received the B.S. and M.S. degrees from Chiba University, Chiba, Japan, in 1974 and 1976, respectively, and the D.E. degree from the Tokyo Institute of Technology, Tokyo, Japan, in 1985, all in electrical engineering. From 1976 to 1979, he was a Research Associate at the Tokyo Institute of Technology. From 1979 to 1989, he was a Research Associate at Chiba University. From 1989 to 1997, he was an Associate Professor at the Department of Electrical and Electronics Engineering, Chiba University, and is currently a Professor at the Graduate School of Engineering, Chiba University. From 2005 to 2009, he was Deputy Vice-President for Research, Chiba University. From 2008 to 2009, he was Vice-Dean of the Graduate School of Engineering, Chiba University. Since April 2009, he has been appointed as Director of Research Center for Frontier Medical Engineering, Chiba University. In 1989, 1994, and 1998, he visited the University of Rennes I, France, as an Invited Professor. Since 2004 he has been appointed as an Adjunct Professor to Institute of Technology Bandung (ITB), Indonesia. His main research interests include analysis and design of printed antennas and small antennas for mobile communications, research on evaluation of the interaction between electromagnetic fields and the human body by use of numerical and experimental phantoms, microwave antennas for medical applications such as cancer treatment, and antenna systems for body-centric wireless communications. He has co-authored over 110 journal papers with review and nine books including Handbook of Microstrip Antennas (IEE, 1989) and Antennas and Propagation for Body-Centric Wireless Communications (Artech House, 2006). Dr. Ito is a Fellow of the IEEE, a Fellow of the IEICE (Institute of Electronics, Information and Communication Engineers, Japan), a member of the American Association for the Advancement of Science, the Institute of Image Information and Television Engineers of Japan (ITE) and the Japanese Society for Thermal Medicine (formerly, Japanese Society of Hyperthermic Oncology). He served as Chair of the Technical Group on Radio and Optical Transmissions, ITE from 1997 to 2001, Chair of the Technical Committee on Human Phantoms for Electromagnetics, IEICE from 1998 to 2006, Chair of the IEEE AP-S Japan Chapter from 2001 to 2002, TPC Co-Chair of the 2006 IEEE International Workshop on Antenna Technology (iWAT2006), Vice-Chair of the 2007 International Symposium on Antennas and Propagation (ISAP2007) in Japan, General Chair of iWAT2008 which was held in Japan in March 2008 and Co-Chair of ISAP2008 which was held in Taiwan in October 2008. He currently serves as an Associate Editor for the IEEE Transactions on Antennas and Propagation, a Distinguished Lecturer and an AdCom member for the IEEE Antennas and Propagation Society, and Chair of the Technical Committee on Antennas and Propagation, IEICE. He has recently been appointed as General Chair of ISAP2012 to be held in Nagoya, Japan in 2012. | ||
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