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Träfflista för sökning "WFRF:(Persson Andreas) ;pers:(Dobsicek Trefna Hana 1979)"

Sökning: WFRF:(Persson Andreas) > Dobsicek Trefna Hana 1979

  • Resultat 1-10 av 12
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1.
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2.
  • Fhager, Andreas, 1976, et al. (författare)
  • Clinical Diagnostics and Treatment with Electromagnetic Fields
  • 2010
  • Ingår i: 4th European Conference on Antennas and Propagation, EuCAP 2010; Barcelona; Spain; 12 April 2010 through 16 April 2010. - 9788476534724 ; , s. C15P2-1
  • Konferensbidrag (refereegranskat)abstract
    • There is a need for novel diagnostic and treatment systems to overcome the limitations with todays modalities. Microwave and THz based system has the potential to become both sensitive and specific in several applications. In this paper we discuss several applications that are currently being developed at the Chalmers University of Technology.
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3.
  • Fhager, Andreas, 1976, et al. (författare)
  • Microwave Technology in Medical Diagnostics and Treatment
  • 2015
  • Ingår i: 2015 Ieee Mtt-S International Microwave Workshop Series on Rf and Wireless Technologies for Biomedical and Healthcare Applications. - New York : Ieee. - 9781479985432 ; , s. 133-134
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
    • There is a great need for novel diagnostics and treatment tools in today's healthcare. In this paper we describe our development and progress in novel microwave based diagnostics and treatment applications. The target applications are stroke diagnostics, breast cancer detection and microwave hyperthermia.
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4.
  • Fhager, Andreas, 1976, et al. (författare)
  • On the use of microwave based thermal monitoring in hyperthermia
  • 2015
  • Ingår i: 9th European Conference on Antennas and Propagation, EuCAP 2015, Lisbon, Portugal, 13-17 May 2015. - 9788890701856
  • Konferensbidrag (refereegranskat)abstract
    • Clinical results show that microwave based hyperthermia can dramatically improve the treatment outcome if combined with radiation and chemo therapy. During hyperthermia treatment it is necessary to monitor the heating in order to ensure that therapeutic temperatures are reached in the tumour, as well as to monitor hot-spots in non-tumour areas. Microwave imaging technology has the potential to be sensitive to changes in the dielectric tissue parameters caused by the hyperthermia heating. In this paper we discuss the feasibility for a combined heating / temperature monitoring system based entirely on microwave technology.
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5.
  • Fhager, Andreas, 1976, et al. (författare)
  • Progress in clinical diagnostics and treatment with electromagnetic fields
  • 2011
  • Ingår i: Proceedings of the 5th European Conference on Antennas and Propagation, EUCAP 2011. Rome, 11-15 April 2011. - 9788882020743 ; , s. 1936-1937
  • Konferensbidrag (refereegranskat)abstract
    • There is a need for novel diagnostic and treatment systems to overcome the limitations with todays modalities. Microwave and THz based system has the potential to become both sensitive and specific in several applications. In this paper we discuss several applications that are currently being developed at the Chalmers University of Technology.
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6.
  • Persson, Mikael, 1959, et al. (författare)
  • Broadband microwave based diagnostics and treatment
  • 2009
  • Ingår i: 3rd European Conference on Antennas and Propagation, EuCAP 2009; Berlin; Germany; 23 March 2009 through 27 March 2009. - 9781424447534 ; , s. 1873-1876
  • Konferensbidrag (refereegranskat)abstract
    • An efficient 3D microwave tomography system based on wide band antennas and detailed modelling using the finite difference time domain methods is presented together with a microwave system design study and a novel microwave hyperthermia cancer treatment system based on a time reversal algorithms.
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7.
  • Persson, Mikael, 1959, et al. (författare)
  • Microwave based diagnostics and treatment
  • 2013
  • Ingår i: 2013 7th European Conference on Antennas and Propagation, EuCAP 2013. - 9788890701832 ; , s. 3118-3119
  • Konferensbidrag (refereegranskat)abstract
    • Microwave based diagnostics and treatment will be discussed with application to stroke diagnostics, 3-D microwave tomography with application to breast cancer diagnostics and microwave hyperthermia with application to cancer treatment.
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8.
  • Persson, Mikael, 1959, et al. (författare)
  • Microwave-Based Stroke Diagnosis Making Global Prehospital Thrombolytic Treatment Possible
  • 2014
  • Ingår i: IEEE Transactions on Biomedical Engineering. - : Institute of Electrical and Electronics Engineers (IEEE). - 0018-9294 .- 1558-2531. ; 61:11, s. 2806-2817
  • Tidskriftsartikel (refereegranskat)abstract
    • Here, we present two different brain diagnostic devices based on microwave technology and the associated two first proof-of-principle measurements that show that the systems can differentiate hemorrhagic from ischemic stroke in acute stroke patients, as well as differentiate hemorrhagic patients from healthy volunteers. The system was based on microwave scattering measurements with an antenna system worn on the head. Measurement data were analyzed with a machine-learning algorithm that is based on training using data from patients with a known condition. Computer tomography images were used as reference. The detection methodology was evaluated with the leave-one-out validation method combined with a Monte Carlo-based bootstrap step. The clinical motivation for this project is that ischemic stroke patients may receive acute thrombolytic treatment at hospitals, dramatically reducing or abolishing symptoms. A microwave system is suitable for prehospital use, and therefore has the potential to allow significantly earlier diagnosis and treatment than today.
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9.
  • Pishnamaz, Seyed Moein, 1995, et al. (författare)
  • Reducing Waves on the Body Surface in Near-Field Medical Diagnostics by a Dielectric Rod Antenna
  • 2023
  • Ingår i: IEEE Transactions on Antennas and Propagation. - 0018-926X .- 1558-2221. ; 71:10, s. 7958-7969
  • Tidskriftsartikel (refereegranskat)abstract
    • The multipath interference caused by the waves traveling on the body surface is a factor that limits the detection accuracy of microwave-based biomedical diagnostic systems. The waves traveling along these paths do not carry information of the area of interest, which is inside the body and are more sensitive to the changes in the space close to the antennas. In this paper for the first time, by placing a dielectric rod between the radiating element of the antenna and the body, the waves on the body surface are largely reduced while the antenna remains matched to the body. We design a Dielectric Rod Antenna (DRA) by deriving a 2-dimensional analytical solution of the wave propagation in a 2-layers cylindrical structure. The design is extended to 3D and further optimized using numerical simulations. It was shown that the addition of the dielectric rod enhances the field confinement by a factor of 2. The performance of the antenna, as verified by phantom measurements, shows that using the DRA increases the ratio of the transmission coefficient to power on the body surface to up to 24 dB and the antenna bandwidth is increased by 71% compared with the antenna without the dielectric rod.
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10.
  • Takook, Pegah, 1982, et al. (författare)
  • A computational study using time reversal focusing for hyperthermia treatment planning
  • 2017
  • Ingår i: Progress in Electromagnetics Research B. - 1937-6472. ; 73:1, s. 117-130
  • Tidskriftsartikel (refereegranskat)abstract
    • In hyperthermia treatment planning (HTP) the goal is to find the amplitudes and phases of antennas in the applicator to efficiently heat the tumor. To do this prior information regarding tumor characteristics such as the size, position and geometry, in addition to an exact model of the hyperthermia applicator is needed. Based on this information, the optimal frequency of operation can be determined. In this paper the optimum frequency for hyperthermia treatment based on the tumor and applicator characteristics, using time reversal as the focusing technique, is studied. As prior information, we consider tumor size and position, the number of the antennas in the applicator and the frequency characteristics. The obtained optimal frequency range is found using hyperthermia quality indicator values calculated from simulations. We also determine the optimum position of the virtual source in the initial step of the time reversal method to increase the quality of the treatment.
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