NEWS
PUBLICATIONS

25/06/2018

Contact
nk@itis.swiss

 

Total Field Reconstruction in the Near Field Using Pseudo-Vector E-Field Measurements

Serge Pfeifer, Eduardo Carrasco, Pedro Crespo-Valero, Esra Neufeld, Sven Kühn, Theodoros Samaras, Andreas Christ, Myles H. Capstick, and Niels Kuster, IEEE Transactions on Electromagnetic Compatibility, Early View, online 19 June 2018, DOI: 10.1109/TEMC.2018.2837897

 
Data-driven experimental evaluation method for the safety assessment of implants with respect to RF-induced heating during MRI
20/04/2018

Data-driven experimental evaluation method for the safety assessment of implants with respect to RF-induced heating during MRI

Aiping Yao, Earl Zastrow, and Niels Kuster, Radio Science, online 20 April 2018, DOI: 10.1029/2017RS006433

Small (mm size) distal electrodes of active medical implants can cause localized radio frequency (RF)-induced power deposition with extreme spatial gradient (5–6 dB/mm). We propose a method that aims to improve the accuracy of the traditional experimental evaluation, which relies solely on hardware instrumentation. A numerically derived local deposition distribution is used to assist the estimation of power deposition. The method was successfully validated against numerical simulations, considering three different generic implants with a single electrode. The estimation of deposited power in the region surrounding the implant electrodes by means of the proposed method was validated,  with less than 1 dB (30%) of uncertainty.

The scientific and technical impact of the study can be summarized as follows:

  • A novel approach for assessing total deposited power at implant hotspots with reduced uncertainty by correlating near-field measurements to numerically derived distributions is described.
  • The approach has been validated with three generic implant designs, and an uncertainty budget has been established.
  • Further investigation is needed to determine whether the proposed method can be extended to devices with multiple electrodes and a wider variety of exposure conditions.
PUBLICATIONS

04/04/2018

Contact
nk@itis.swiss

 

Effect of cell phone radiofrequency radiation on body temperature in rodents: Pilot studies of the National Toxicology Program's reverberation chamber exposure system

Michael E. Wyde, Thomas L. Horn, Myles H. Capstick, John M. Ladbury, Galen Koepke, Perry F. Wilson, Grace E. Kissling, Matthew D. Stout, Niels Kuster, Ronald L. Melnick, James Gauger, John R. Bucher, and David L. McCormick, Bioelectromagnetics, Volume 39, Issue 3, pp. 190–199, April 2018, Online: 22 December 2017; doi: 10.1002/bem.22116.

 
PUBLICATIONS

03/04/2018

Contact
nk@itis.swiss

 

Behavioural phenotypes in mice after prenatal and early postnatal exposure to intermediate frequency magnetic fields

Kajal Kumari, Hennariikka Koivisto, Myles Capstick, Jonne Naarala, Matti Viluksela, Heikki Tanila, and Jukka Juutilainen, Environmental Research, Volume 162, pp. 27-34, April 2018, Online: 22 December 2017; doi: 10.1016/j.envres.2017.12.013.