The Experts below are selected from a list of 1704 Experts worldwide ranked by ideXlab platform
Fu-chiarng Chen - One of the best experts on this subject based on the ideXlab platform.
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On-Body Adhesive-Bandage-Like Antenna for Wireless Medical Telemetry Service
IEEE Transactions on Antennas and Propagation, 2014Co-Authors: Yu-jen Chi, Fu-chiarng ChenAbstract:This paper presents a novel planar, via-free, printed antenna for wireless Medical Telemetry service (WMTS). The antenna structure is simple and looks like an adhesive bandage, and can be placed on human tissue. Depending on the application, the antenna can be used as a standalone antenna when it is fed by a coaxial cable, or it can be integrated with a single-chip sensor, with the chip placed in the center. Antenna parameters, such as reflection coefficients, radiation patterns, radiation efficiency, and the specific absorption rate, were evaluated in various scenarios to validate the proposed design. The measured radiation efficiency of the proposed adhesive-bandage-like antenna was 89.5% in free space and 44.7% when mounted on tissue-equivalent phantom. The antenna also retained its broad side radiation characteristics when it was bent at 90 °. The proposed antenna is a favorable candidate for use in wireless body area networks (WBANs). This paper presents the detailed design considerations of the proposed antenna.
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A novel planar antenna for wireless body area network
Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation, 2012Co-Authors: Yu-jen Chi, Fu-chiarng ChenAbstract:A novel planar antenna for wireless Medical Telemetry service is presented. It can be placed on the human body tissue with good antenna gain. This design is via-free and the half-wavelength patch mode of the antenna can be excited with a special feeding scheme. For different applications, the antenna can be used as a stand-alone antenna when it is fed by a coaxial cable, or to be integrated with a single chip sensor where the chip can be placed at the center of the antenna. Antenna parameters such as return loss and radiation patterns are also evaluated to validate the proposed design. Its characteristics of vialess, compact, and planar makes it a good candidate for wireless body area network applications.
Konstantina S. Nikita - One of the best experts on this subject based on the ideXlab platform.
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Dual-Band Implantable Antennas for Medical Telemetry: a Fast Design Methodology and Validation for Intra-Cranial Pressure Monitoring
Progress In Electromagnetics Research, 2013Co-Authors: Asimina Kiourti, Konstantinos A. Psathas, Jorge R. Costa, Carlos A. Fernandes, Konstantina S. NikitaAbstract:In this study, we suggest and experimentally validate a methodology for fast and optimized design of dual-band implantable antennas for Medical Telemetry (MICS, 402{405MHz, and ISM, 2400{2480MHz). The methodology aims to adjust the design of a parametric dual-band antenna model towards optimally satisfying the requirements imposed by the antenna-fabrication procedure and Medical application in hand. Design is performed in a systematic, fast, and accurate way. To demonstrate its efiectiveness, the proposed methodology is applied to optimize the parametric antenna model for intra-cranial pressure (ICP) monitoring given a speciflc antenna- fabrication procedure. For validation purposes, a prototype of the optimized antenna is fabricated and experimentally tested. The proposed antenna is further evaluated within a 13-tissue anatomical head model in terms of resonance, radiation, and safety performance for ICP monitoring. Extensive parametric studies of the optimized antenna are, flnally, performed. Feasibility of the proposed parametric antenna model to be optimally re-adjusted for various scenarios is demonstrated, and generic guidelines are provided for implantable antenna design. Dual-band operation is targeted to ensure energy
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Design of Implantable Antennas for Medical Telemetry: Dependence upon Operation Frequency, Tissue Anatomy, and Implantation Site
International Journal of Monitoring and Surveillance Technologies Research, 2013Co-Authors: Asimina Kiourti, Konstantina S. NikitaAbstract:Implantable Medical Devices IMDs with wireless Telemetry functionalities in the radio-frequency RF range are recently attracting significant scientific interest for Medical prevention, diagnosis, and therapy. One of the most crucial challenges for IMDs is the design of the integrated implantable antenna which enables bidirectional wireless communication between the IMD and exterior monitoring/control equipment. In this paper, a parametric model of a miniature implantable antenna is initially proposed, which can be adjusted to suit any antenna design and implantation scenario requirements in hand. Dependence of the resonance, radiation, and safety performance of implantable antennas upon a operation frequency, b tissue anatomy and dielectric properties, and c implantation site is further studied. Simulations are carried out: a at 402, 433, 868 and 915 MHz considering a 13-tissue anatomical head model, b at 402 MHz considering five head models 3-and 5-layer spherical, 6-, 10-and 13-tissue anatomical and seven dielectric parameter scenarios variations ±20% in the reference permittivity and conductivity values, and c at 402 MHz considering 3-layer canonical models of the human head, arm, and trunk. The study provides valuable insight into the design of implantable antennas. Finite Element and Finite Difference Time Domain numerical solvers are used.
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MobiHealth - Performance of Miniature Implantable Antennas for Medical Telemetry at 402, 433, 868 and 915 MHz
Lecture Notes of the Institute for Computer Sciences Social Informatics and Telecommunications Engineering, 2013Co-Authors: Asimina Kiourti, Konstantina S. NikitaAbstract:In this paper, we compare the performance of implantable antennas for integration into implantable Medical devices and Telemetry in the MICS (402.0–405.0 MHz) and ISM (433.1–434.8, 868.0–868.6 and 902.8–928.0 MHz) bands. A parametric model of a miniature (volume of 32.7 mm3) patch antenna is proposed for skin–implantation, and further refined for each frequency set–up. Implantation inside canonical models of the human head, arm and trunk is considered, and the antenna resonance, radiation and safety performance is compared. Results indicate enhanced bandwidth and improved radiation and safety performance at higher frequencies because of the increased copper surface area. Implantation of a specific antenna inside different parts of the human body is shown to insignificantly affect its performance.
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Recent Advances in Implantable Antennas for Medical Telemetry [Education Column]
IEEE Antennas and Propagation Magazine, 2012Co-Authors: Asimina Kiourti, Konstantina S. NikitaAbstract:Implantable Medical devices (IMDs) have recently been receiving considerable attention for Medical diagnosis and treatment. Some of the most crucial scientific challenges for implantable Medical devices are related to the implantable antenna, which is integrated into the implantable Medical device to allow its bidirectional communication with exterior monitoring/control equipment. The aim of this paper is to provide an overview of the research efforts carried out by the authors regarding the numerical design, experimental testing, and performance evaluation of implantable antennas for Medical Telemetry.
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Accelerated Design of Optimized Implantable Antennas for Medical Telemetry
IEEE Antennas and Wireless Propagation Letters, 2012Co-Authors: Asimina Kiourti, Konstantina S. NikitaAbstract:We modify our latest reported methodology for implantable antenna design in an attempt to further accelerate the design while achieving optimized resonance characteristics. Design is performed inside a small-sized single- or multilayer tissue box for the single-layer tissue model (SLTM) and the multilayer tissue model (MLTM) variations, respectively. Given a specific Medical application scenario, the idea is to take into account the dielectric loading of the surrounding tissues and exterior air on the antenna while using an adequately small tissue model to speed up simulations. Effectiveness of the methodology is assessed for antenna design aimed at intracranial pressure (ICP) monitoring and cardiac pacemaker applications. The MLTM variation provides more accurate results than the SLTM at the expense of being slightly more complex and slow.
Yu-jen Chi - One of the best experts on this subject based on the ideXlab platform.
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On-Body Adhesive-Bandage-Like Antenna for Wireless Medical Telemetry Service
IEEE Transactions on Antennas and Propagation, 2014Co-Authors: Yu-jen Chi, Fu-chiarng ChenAbstract:This paper presents a novel planar, via-free, printed antenna for wireless Medical Telemetry service (WMTS). The antenna structure is simple and looks like an adhesive bandage, and can be placed on human tissue. Depending on the application, the antenna can be used as a standalone antenna when it is fed by a coaxial cable, or it can be integrated with a single-chip sensor, with the chip placed in the center. Antenna parameters, such as reflection coefficients, radiation patterns, radiation efficiency, and the specific absorption rate, were evaluated in various scenarios to validate the proposed design. The measured radiation efficiency of the proposed adhesive-bandage-like antenna was 89.5% in free space and 44.7% when mounted on tissue-equivalent phantom. The antenna also retained its broad side radiation characteristics when it was bent at 90 °. The proposed antenna is a favorable candidate for use in wireless body area networks (WBANs). This paper presents the detailed design considerations of the proposed antenna.
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A novel planar antenna for wireless body area network
Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation, 2012Co-Authors: Yu-jen Chi, Fu-chiarng ChenAbstract:A novel planar antenna for wireless Medical Telemetry service is presented. It can be placed on the human body tissue with good antenna gain. This design is via-free and the half-wavelength patch mode of the antenna can be excited with a special feeding scheme. For different applications, the antenna can be used as a stand-alone antenna when it is fed by a coaxial cable, or to be integrated with a single chip sensor where the chip can be placed at the center of the antenna. Antenna parameters such as return loss and radiation patterns are also evaluated to validate the proposed design. Its characteristics of vialess, compact, and planar makes it a good candidate for wireless body area network applications.
Yasushi Matsumoto - One of the best experts on this subject based on the ideXlab platform.
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Electromagnetic Compatibility of 400 MHz Radio Communications in Hospitals: Safety Management of Wireless Medical Telemetry.
Journal of medical systems, 2020Co-Authors: Kai Ishida, Kaoru Gototh, Yasushi MatsumotoAbstract:The electromagnetic compatibility (EMC) of 400 MHz radio communications is an issue of growing interest, especially the EMC of wireless Medical Telemetry (WMT) in clinical settings. Electromagnetic interference (EMI) by radiation noise emitted from switched-mode power supplies built into light-emitting diode (LED) lights is now of considerable interest for the safe operation of WMT. Moreover, the 400 MHz frequency bands that are allocated for WMT are also shared and used for other radio communication systems. In this work, we studied the EMI problem of WMT used in Japan. We experimentally investigated EMI with WMT caused by electromagnetic noise emitted from LED lights. In addition, we suggested countermeasures for these EMI issues and the management of an electromagnetic environment by a very simplified method.
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Electromagnetic Compatibility of 400 MHz Radio Communications in Hospitals: Safety Management of Wireless Medical Telemetry
Journal of Medical Systems, 2020Co-Authors: Kai Ishida, Kaoru Gototh, Yasushi MatsumotoAbstract:The electromagnetic compatibility (EMC) of 400 MHz radio communications is an issue of growing interest, especially the EMC of wireless Medical Telemetry (WMT) in clinical settings. Electromagnetic interference (EMI) by radiation noise emitted from switched-mode power supplies built into light-emitting diode (LED) lights is now of considerable interest for the safe operation of WMT. Moreover, the 400 MHz frequency bands that are allocated for WMT are also shared and used for other radio communication systems. In this work, we studied the EMI problem of WMT used in Japan. We experimentally investigated EMI with WMT caused by electromagnetic noise emitted from LED lights. In addition, we suggested countermeasures for these EMI issues and the management of an electromagnetic environment by a very simplified method.
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Evaluation of Electromagnetic Noise Radiated from Tube-type LED Lamps and Its Effect on Wireless Medical Telemetry Systems
2019 International Symposium on Electromagnetic Compatibility - EMC EUROPE, 2019Co-Authors: Kai Ishida, Sazu Arie, Kaoru Gotoh, Yasushi MatsumotoAbstract:Light-emitting diode (LED) lamps have been widely introduced in the healthcare field. On the other hand, electromagnetic interference with wireless Medical Telemetry systems by switched-mode power supplies built in LED lamps has been a serious problem. We have investigated electromagnetic noise radiated from bulb-type LED lamps and its effect on wireless Medical Telemetry systems. In this study, we focus on tube-type LED lamps and investigated the statistical characteristics of electromagnetic noise radiated from them. Additionally, the critical reception of wireless Medical Telemetry systems subjected to interference by tube-type LED lamp installation was investigated.
Kaushik R Chowdhury - One of the best experts on this subject based on the ideXlab platform.
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enhancing wireless Medical Telemetry through dynamic spectrum access
International Conference on Communications, 2012Co-Authors: Rahman Doostmohammady, Kaushik R ChowdhuryAbstract:Wireless Medical Telemetry Systems (WMTS) currently operate on FCC designated bands for transmitting critical patient health information to distant receivers within hospitals. However, the current devices experience intermittent interference from digital TV transmissions in neighboring channels; are prohibited from transmitting multimedia data; and must operate with a secondary access priority in portions of the WMTS band, also shared with utility metering. We propose a fundamentally new communication paradigm for Medical Telemetry through dynamic spectrum access technology that adheres to the access rules in the WMTS band, and yet addresses the above concerns. The contributions of the paper are as follows: (i) we undertake a spectrum measurement study at hospital locations in the Boston area to model spectrum usage and activities in the Medical band, (ii) we formulate the channel and power allocation task as an optimization problem under constrains of permissible electromagnetic interference to sensitive Medical equipment, and latency, bandwidth thresholds of the Medical data. Simulation results reveal the potential benefit of the use of dynamic spectrum access to improve Medical Telemetry and promises long-term improvement in the healthcare domain.
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ICC - Enhancing wireless Medical Telemetry through dynamic spectrum access
2012 IEEE International Conference on Communications (ICC), 2012Co-Authors: Rahman Doost-mohammady, Kaushik R ChowdhuryAbstract:Wireless Medical Telemetry Systems (WMTS) currently operate on FCC designated bands for transmitting critical patient health information to distant receivers within hospitals. However, the current devices experience intermittent interference from digital TV transmissions in neighboring channels; are prohibited from transmitting multimedia data; and must operate with a secondary access priority in portions of the WMTS band, also shared with utility metering. We propose a fundamentally new communication paradigm for Medical Telemetry through dynamic spectrum access technology that adheres to the access rules in the WMTS band, and yet addresses the above concerns. The contributions of the paper are as follows: (i) we undertake a spectrum measurement study at hospital locations in the Boston area to model spectrum usage and activities in the Medical band, (ii) we formulate the channel and power allocation task as an optimization problem under constrains of permissible electromagnetic interference to sensitive Medical equipment, and latency, bandwidth thresholds of the Medical data. Simulation results reveal the potential benefit of the use of dynamic spectrum access to improve Medical Telemetry and promises long-term improvement in the healthcare domain.
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Transforming healthcare and Medical Telemetry through cognitive radio networks
IEEE Wireless Communications, 2012Co-Authors: Rahman Doost-mohammady, Kaushik R ChowdhuryAbstract:The Wireless Medical Telemetry Services (WMTS) band has been established by the FCC in the United States for transmission of data related to a patient?s health, and similar reserved channels exist for life-critical communications throughout the world. However, transmissions in the WMTS band are severely hampered by interferences from adjacent digital television channels, and due to non-uniform access priority, as this band is also shared by utility Telemetry and government installations. In this article, we propose the use of cognitive radio technology to dynamically utilize the WMTS frequencies based on the activity patterns of the high priority users, and the quality of service constraints of the patients? data, while ensuring protection to existing higher priority transmissions and the safe operation of sensitive Medical equipment. The priority users here are utility Telemetry transmissions in certain portions of the WMTS band, government run radar sites, and legacy Medical Telemetry equipment without cognitive radio capability. We provide the first measurements on the complete WMTS spectrum activity at two major hospital locations in the Boston area, and outline an optimization framework that assigns frequency and transmission power jointly in this setting. The article also discusses the current state of the art and the major challenges in the implementation of this new cognitive radio assisted Medical Telemetry paradigm.