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2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med)最新文献

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Measurements of complex permittivity and permeability in the GHz range of magnetotactic bacteria suspensions 趋磁细菌悬浮液在GHz范围内复介电常数和磁导率的测量
2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med) Pub Date : 2018-09-01 DOI: 10.23919/EMF-MED.2018.8526057
L. Farrugia, S. Miclaus, C. Moisescu, I. Ardelean, C. Sammut
{"title":"Measurements of complex permittivity and permeability in the GHz range of magnetotactic bacteria suspensions","authors":"L. Farrugia, S. Miclaus, C. Moisescu, I. Ardelean, C. Sammut","doi":"10.23919/EMF-MED.2018.8526057","DOIUrl":"https://doi.org/10.23919/EMF-MED.2018.8526057","url":null,"abstract":"Magnetotactic bacteria (MTB) cells contain chains of magnetosomes, which are magnetite nanocrystals enveloped in a lipid bilayer. A water-based suspension of cultured MTB was prepared and the electric and magnetic properties were measured by two methods: a reflection method using an open-ended coaxial probe (0.5-50 GHz) and a transmission method using a rectangular waveguide (8.2-12.4 GHz). Based on the very good agreement obtained for the measured complex permittivity of a saline solution with data in the literature, we report here the results of both the complex permittivity and permeability of a suspension of cultured MTB.","PeriodicalId":134768,"journal":{"name":"2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126766247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Impedance measurement of bipolar stimulation electrodes immersed in medium 浸泡在介质中的双极刺激电极的阻抗测量
2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med) Pub Date : 2018-09-01 DOI: 10.23919/EMF-MED.2018.8526008
A. Šarolić, Ivan Škalic, A. Deftu, D. Sapunar
{"title":"Impedance measurement of bipolar stimulation electrodes immersed in medium","authors":"A. Šarolić, Ivan Škalic, A. Deftu, D. Sapunar","doi":"10.23919/EMF-MED.2018.8526008","DOIUrl":"https://doi.org/10.23919/EMF-MED.2018.8526008","url":null,"abstract":"We measured the impedance of bipolar stimulation electrode immersed in two media of interest for electrostimulation: extracellular fluid (ECF), and cerebrospinal fluid (CSF). Using a convenient method, the impedance magnitude and phase were measured within a frequency range from 10 Hz to 20 kHz. The impedance magnitudes were in 1 kΩ range, having capacitive character, a strong frequency dependence, and observable dependence on temperature and medium layer thickness.","PeriodicalId":134768,"journal":{"name":"2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115095556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Can magnetic nanoparticles thermally assist the beneficiary role of transcranial magnetic stimulation? 磁性纳米颗粒是否可以热辅助经颅磁刺激的受益作用?
2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med) Pub Date : 2018-09-01 DOI: 10.23919/EMF-MED.2018.8526017
T. Odutola, E. Myrovali, A. Makridis, N. Maniotis, M. Angelakeris, V. Kimiskidis, T. Samaras
{"title":"Can magnetic nanoparticles thermally assist the beneficiary role of transcranial magnetic stimulation?","authors":"T. Odutola, E. Myrovali, A. Makridis, N. Maniotis, M. Angelakeris, V. Kimiskidis, T. Samaras","doi":"10.23919/EMF-MED.2018.8526017","DOIUrl":"https://doi.org/10.23919/EMF-MED.2018.8526017","url":null,"abstract":"We present an experimental study of ferrimagnetic iron oxide nanoparticles embedded in agarose matrix exposed at a typical transcranial magnetic stimulation protocol (TMS). We aim to study the effect of magnetic field on the temperature response of nanoparticles and its potential assist on the therapeutic outcome in transcranial magnetic stimulation. Our results outline that, if magnetic nanoparticles are incorporated in a TMS protocol, they facilitate temperature increase and eventually milder magnetic fields with respect intensity, frequency and duration, achieve the therapeutic region of 41-45°C. Thus, such protocols may be safely tolerated according to the Brezovich criterion, that provides the upper limit of Hf product for patient discomfort.","PeriodicalId":134768,"journal":{"name":"2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129418553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effects of Extremely Low Frequency Electromagnetic Fields on Stem Cells are not Caused by Zinc Ions 极低频电磁场对干细胞的影响不是由锌离子引起的
2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med) Pub Date : 2018-09-01 DOI: 10.23919/EMF-MED.2018.8526002
A. Özgün, B. Garipcan
{"title":"Effects of Extremely Low Frequency Electromagnetic Fields on Stem Cells are not Caused by Zinc Ions","authors":"A. Özgün, B. Garipcan","doi":"10.23919/EMF-MED.2018.8526002","DOIUrl":"https://doi.org/10.23919/EMF-MED.2018.8526002","url":null,"abstract":"For non-invasive intervention methods, magnetic field applications have recently become popular, due to their undisturbed tissue permeability. Despite the fact that extremely low frequency magnetic fields were shown to have substantial effects, lack of explanation for the mechanism prevents their use. Efforts for revealing a mechanism showed that magnetic field exposure increases EGFR phosphorylation and intracellular calcium levels. However, studies investigating intracellular calcium levels used non-specific probes and have actually showed an increase in total divalent cation levels. Moreover, magnetic field activated pathways have zinc binding metalloproteases in their upstream processes, which have never been studied. These clues point to a substantial role of zinc in these effects. We show an increase of intracellular cation levels but this could not be tied to an increase in partial concentration of zinc ions. These results imply ELF EMF exposure to cause effects that are not regulated by zinc dependent pathways.","PeriodicalId":134768,"journal":{"name":"2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124035517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Brain stimulation by modulated microwave radiation: a feasibility study 调制微波辐射脑刺激的可行性研究
2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med) Pub Date : 2018-09-01 DOI: 10.23919/EMF-MED.2018.8526055
M. Bachmann, J. Lass, A. Ioannides, H. Hinrikus
{"title":"Brain stimulation by modulated microwave radiation: a feasibility study","authors":"M. Bachmann, J. Lass, A. Ioannides, H. Hinrikus","doi":"10.23919/EMF-MED.2018.8526055","DOIUrl":"https://doi.org/10.23919/EMF-MED.2018.8526055","url":null,"abstract":"The aim of this study was to evaluate the feasibility of stimulating the brain oscillations at predetermined frequencies using low level modulated (40 Hz) microwave radiation (450 Hz). The field power density was 0.16 mW/cm2. The resting EEG of 14 subjects was recorded and EEG power at fixed frequencies was analyzed. A relative change in the EEG power during 10 cycles with and without radiation was used as a quantitative measure. Microwave radiation caused statistically significant increase in the average EEG power at expected 10, 20 and 30 Hz frequency bands. The results indicate that low-level modulated microwave radiation is able to stimulate brain oscillations at selected frequencies.","PeriodicalId":134768,"journal":{"name":"2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133178564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Peak-projection algorithm to target the phase of cortical oscillations in real-time 峰值投影算法实时定位皮层振荡的相位
2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med) Pub Date : 2018-09-01 DOI: 10.23919/EMF-MED.2018.8526056
L. Tomasevic, H. Siebner
{"title":"Peak-projection algorithm to target the phase of cortical oscillations in real-time","authors":"L. Tomasevic, H. Siebner","doi":"10.23919/EMF-MED.2018.8526056","DOIUrl":"https://doi.org/10.23919/EMF-MED.2018.8526056","url":null,"abstract":"Focal transcranial stimulation targeting different phases of a locally expressed oscillation can reveal the functional significance of the phase itself and may reduce the variability of the brain response to stimulation. To target the phase online, it is necessary to deal with distortions at the edge of the time-window used for online filtering and to predict the targeted phase at the time of stimulation. We propose a simple algorithm involving a padding step to minimize the filter-induced distortion and the prediction of the phase from the last peaks of the filtered signal. The novel peak-projection algorithm was validated for online phase targeting of precentral alpha activity on a set of resting-state EEG data in four healthy volunteers.","PeriodicalId":134768,"journal":{"name":"2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128918831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Design of an Experimental Setup for Freely Positionable Coil Pairs for Transcutaneous Energy Transfer Systems 经皮能量传递系统中可自由定位线圈对实验装置的设计
2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med) Pub Date : 2018-09-01 DOI: 10.23919/EMF-MED.2018.8526066
Alexander Enssle, Laurenz Bareiss, N. Parspour
{"title":"Design of an Experimental Setup for Freely Positionable Coil Pairs for Transcutaneous Energy Transfer Systems","authors":"Alexander Enssle, Laurenz Bareiss, N. Parspour","doi":"10.23919/EMF-MED.2018.8526066","DOIUrl":"https://doi.org/10.23919/EMF-MED.2018.8526066","url":null,"abstract":"Mechanical circulatory support systems (MCSS), such as the left ventricular assist device (LVAD), still employ percutaneous drive-lines for the power supply of implanted components. Transcutaneous energy transfer (TET) offers the possibility to reduce drive-line related infections, but also improve patients’ every day life. In this paper, an experimental setup is presented, that allows for the experimental determination of the coupling factor and the verification of positioning tolerant approaches of coil systems. The setup is developed with the particular requirements for the application regarding the positioning of the coils. Measurements show a very good agreement against an analytical approach for the calculation of the coupling factor.","PeriodicalId":134768,"journal":{"name":"2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114859152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
3D Printable Solid Tissue-Mimicking Material for Microwave Phantoms 用于微波幻影的3D可打印固体组织模拟材料
2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med) Pub Date : 2018-09-01 DOI: 10.23919/EMF-MED.2018.8526005
Barry Mcdermott, E. Porter, M. O’halloran, A. Poudel, M. Biggs, Nireeksha S. Karode, A. Coffey
{"title":"3D Printable Solid Tissue-Mimicking Material for Microwave Phantoms","authors":"Barry Mcdermott, E. Porter, M. O’halloran, A. Poudel, M. Biggs, Nireeksha S. Karode, A. Coffey","doi":"10.23919/EMF-MED.2018.8526005","DOIUrl":"https://doi.org/10.23919/EMF-MED.2018.8526005","url":null,"abstract":"Phantoms provide valuable platforms for testing of medical devices including microwave diagnostic systems. This work describes a 3D printable solid tissue-mimicking material (TMM) for the production of such phantoms. The TMM is fabricated from ABS, SEBS and Carbon Black. The polymers ABS and SEBS produce a material that is 3D printable, robust and mechanically stable. Adjustment of the percentage of Carbon Black in a mixture alters the dielectric properties of the mixture. A variety of such mixtures were fabricated into 3D printable spools and the dielectric properties were measured across the 0.5 – 8.5 GHz band. The dielectric properties of a wide biological range are covered with the ability to emulate tissues within the range. The material hence can be used to print anatomically realistic and dielectrically accurate phantoms that can be multi-layered and as complex as desired depending on the study.","PeriodicalId":134768,"journal":{"name":"2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122120046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
A study on the variation of dielectric properties of grey matter with temperature 灰质介电特性随温度变化的研究
2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med) Pub Date : 2018-09-01 DOI: 10.23919/EMF-MED.2018.8526004
J. Bonello, A. Athanasiadis, L. Farrugia, C. Sammut
{"title":"A study on the variation of dielectric properties of grey matter with temperature","authors":"J. Bonello, A. Athanasiadis, L. Farrugia, C. Sammut","doi":"10.23919/EMF-MED.2018.8526004","DOIUrl":"https://doi.org/10.23919/EMF-MED.2018.8526004","url":null,"abstract":"Microwave hyperthermia is used in conjunction with radiotherapy and chemotherapy to provide a more effective way of treating cancer in the brain. The dielectric properties of brain tissue are important in predicting specific absorption rate (SAR) patterns in the brain. This study investigates the variation of brain dielectric properties as a function of frequency and temperature as these are crucial for SAR calculations, and hence treatment planning. We measured dielectric properties of freshly excised porcine brain tissues over the frequency range 0.4 to 20 GHz from room temperature to 60 °C. The results show that the permittivity decreases with temperature at all frequencies while the conductivity does not vary significantly below 1 GHz and decreases above this frequency.","PeriodicalId":134768,"journal":{"name":"2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124038458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
EMF-Med 2018 Technical Program Committee EMF-Med 2018技术计划委员会
2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med) Pub Date : 2018-09-01 DOI: 10.23919/emf-med.2018.8526064
{"title":"EMF-Med 2018 Technical Program Committee","authors":"","doi":"10.23919/emf-med.2018.8526064","DOIUrl":"https://doi.org/10.23919/emf-med.2018.8526064","url":null,"abstract":"","PeriodicalId":134768,"journal":{"name":"2018 EMF-Med 1st World Conference on Biomedical Applications of Electromagnetic Fields (EMF-Med)","volume":"10 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129136470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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