The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지
DOI QR코드

DOI QR Code

Electromagnetic Compatibility Study of a Medical Lead for MRI Systems

자기공명영상시스템에서의 의료용 리드선의 전자기적 호환 연구

  • Received : 2016.10.07
  • Accepted : 2016.11.27
  • Published : 2016.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

In the presence of an electrically conducting medical lead, radio frequency (RF) coils in magnetic resonance imaging (MRI) systems may concentrate the RF energy and cause tissue heating near the lead. A novel design for a medical lead to reduce this heating by introducing pins in the lead is presented. Peak 10 g specific absorption rate (SAR) in heart tissue, an indicator of heating, was calculated and compared for both conventional (Medtronic) lead design and our proposed design. Remcom XFdtd software was used to calculate the peak SAR distribution in a realistic model of the human body. The model contained a medical lead that was exposed to RF magnetic fields at 64 MHz (1.5 T), 128 MHz (3 T) and 300 MHz (7 T) using a model of an MR birdcage body coil. The proposed design of adding pins to the medical lead can significantly reduce the heating from different MRI systems.

Keywords

References

  1. J. Vaughan, M. Garwood, C. M. Collins, W. Liu, L. DelaBarre, G. Adriany, P. Andersen, H. Merkle, R. Goebel, M.B. Smith, and K. Ugurbil, "7T vs. 4T: RF power, homogeneity, and signal-to-noise comparison in head images," Magn Reson Med, vol. 46, no. 1, pp. 24-30, Jul. 2001. https://doi.org/10.1002/mrm.1156
  2. J. Vaughan, L. DelaBarre, C. Snyder, J. Tian, C. Akgun, D. Shrivastava, W. Liu, C. Olson, G. Adriany, J. Strupp, P. Anderson, A. Gopinath, and P. Moortele, "9.4 T human MRI: Preliminary results," Magn. Reson Med., vol. 56, pp. 1274-1282, Oct. 2006 https://doi.org/10.1002/mrm.21073
  3. H. Yoo, A. Gopinath, and J. T. Vaughan, "A method to localize RF B1 field in high-field magnetic resonance imaging systems," IEEE Trans. on Biomed. Eng., vol. 59, no. 12, pp. 3365-3371, Dec. 2012 https://doi.org/10.1109/TBME.2012.2208965
  4. S. M. Park, R. Kamondetdacha, and J. A. Nyenhuis, "Calculation of MRI-Induced Heating of an Implanted medical lead wire with an electric field transfer function," Journal of Magnetic Resonance Imaging., vol.26, pp. 1278-85, 2007. https://doi.org/10.1002/jmri.21159
  5. R. Das and H. Yoo, "Innovative design of implanted medical lead to reduce MRI-induced scattered electric fields," IET Electron. Lett., vol. 49, No. 5, pp. 323-324, Feb. 2013. https://doi.org/10.1049/el.2012.4033
  6. EH Villaseca, GL Dublin. "Electromagnetic trap for a lead," US Patent App., Jan 29, 2002.
  7. L. A. Zaremba, "FDA guidelines for magnetic resonance equipment safety," Center for Devices and Radiol. Health, Food, Drug Admin., Rockville, MD, YEAR [Online]. Available: http://www.aapm.org/meetings/02AM/pdf/8356-8054.pdf.