Measuring AC magnetic field distribution using MRI

Muftuler L., Ider Y.

18th Annual International Conference of IEEE Engineering-in-Medicine-amd-Biology-Society, Amsterdam, Netherlands, 31 October - 03 November 1996, vol.18, pp.705-706 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 18
  • City: Amsterdam
  • Country: Netherlands
  • Page Numbers: pp.705-706
  • Middle East Technical University Affiliated: No


Electric currents Pre applied to body in numerous applications in medicine, such as Electrical Impedance Tomography (EIT), cardiac defibrillators, electrocautery and some treatment methods in physiotherapy. IT the magnetic field within a region is measured, the currents generating these fields can be calculated using the curl operator. In this study, magnetic fields generated by AC currents injected into a phantom is measured using MRI. A pulse sequence that is originally designed for mapping static magnetic field Is used. AC currents In the form of burst sine wave is applied sychronous with the pulse sequence, Results show that this method can be used in applications where the frequency of the currents is in the audio range and the amplitude is a few milliamperes or larger depending on SNR.