Measuring stroke volume with wearable RF antennas: a validation study with EM simulations and MRI
Bart Romke Steensma1, Christina Anna Louka1,2, Alexander Jurriaan Eberhardt Raaijmakers3, and Cornelis Antonius Theodorus van den Berg1
1Center for Image Sciences, Computational Imaging Group, University Medical Center Utrecht, Utrecht, Netherlands, 2School of Applied Mathematical and Physical Sciences, Department of Physics, National Technical University of Athens, Athens, Greece, 3Biomedical Engineering, Medical Imaging Analysis, Eindhoven University of Technology, Eindhoven, Netherlands
We developed a wearable setup to detect heart motion and stroke volume with an RF antenna connected to a miniature network analyzer. EM simulations were used to demonstrate the possibility of measuring changes in stroke volume with an RF antenna and to investigate the spatial sensitivity of the antenna. A Valsalva manoeuver was used to provoke changes in stroke volume, which were observed with the RF antenna and in cine MRI acquisitions.
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