Reduction of the radiofrequency heating of metallic devices using a dual-drive birdcage coil

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
Yigitcan EryamanErgin Atalar

Abstract

In this work, it is demonstrated that a dual-drive birdcage coil can be used to reduce the radiofrequency heating of metallic devices during magnetic resonance imaging. By controlling the excitation currents of the two channels of a birdcage coil, the radiofrequency current that is induced near the lead tip could be set to zero. To monitor the current, the image artifacts near the lead tips were measured. The electric field distribution was controlled using a dual-drive birdcage coil. With this method, the lead currents and the lead tip temperatures were reduced substantially [<0.3 °C for an applied 4.4 W/kg SAR compared to >4.9 °C using quadrature excitation], as demonstrated by phantom and animal experiments. The homogeneity of the flip angle distribution was preserved, as shown by volunteer experiments. The normalized root-mean-square error of the flip angle distribution was less than 10% for all excitations. The average specific absorption rate increased as a trade-off for using different excitation patterns.

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Citations

Feb 17, 2015·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Theresa J BachschmidtMathias Nittka
Dec 19, 2014·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Maryam Etezadi-AmoliGreig Scott
Mar 14, 2014·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Christopher W EllenorGreig C Scott
Apr 10, 2016·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Laleh GolestaniradLawrence L Wald
Jun 21, 2014·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Yigitcan EryamanLawrence L Wald
Jan 13, 2017·Medical Physics·Xin Chen, Michael Steckner
Sep 16, 2017·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Berk SilemekErgin Atalar
Apr 12, 2018·Physics in Medicine and Biology·Bastien GuerinLawrence L Wald
Nov 14, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Felipe GodinezShaihan J Malik
Nov 26, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Volkan AcikelErgin Atalar
Jan 22, 2020·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Ali Caglar ÖzenMichael Bock
Jul 9, 2020·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Lukas WinterBernd Ittermann
Apr 25, 2018·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Janot P TokayaCornelis A T van den Berg
May 28, 2020·Journal of Magnetic Resonance Imaging : JMRI·Lukas WinterBernd Ittermann
Jul 1, 2020·Magma·Alireza Sadeghi-TarakamehErgin Atalar
Feb 7, 2017·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·J P TokayaC A T van den Berg
Nov 5, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Laleh GolestaniradJohn Kirsch
Nov 17, 2016·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Luca ZilbertiMario Chiampi
Jul 22, 2021·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Felipe GodinezShaihan J Malik
Aug 11, 2021·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Yu WangJi Chen
Aug 17, 2021·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Berk SilemekLukas Winter

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