Magnetic field sensitivity at 7-T using dual-helmholtz transmit-only coil and 12-channel receive-only bended coil

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Kyoung-Nam KimYoung-Bo Kim

Abstract

The purpose of this study was to combine a dual-Helmholtz (DH) transmit (Tx)-only coil and 12-channel receive (Rx)-only bended phased array (PA) coil to improve the magnetic flux (|B1 |) sensitivity in the superior-to-inferior (S-I) direction during human brain magnetic resonance imaging (MRI) at 7-T. The proposed coil combination was primarily implemented by electromagnetic (EM) simulation and compared with the 16-leg birdcage coil and 8-channel PA coil, which are generally used for the Tx- and Rx-only modes, respectively. The optimal coil combinations for the proposed structure were determined by |B1 | field calculations using the |BT(+) | and |BR(-) | fields, which are respectively the transmit and receive components of the |B1 | field. The coil performance was then evaluated by a bench test and 7-T MRI experiment. The results of the computational calculations indicated that the |BT(+) | field of the DH coil was distributed similarly to that of the 16-leg birdcage coil despite the fewer conducting legs of the former. However, the 12-channel Rx-only bended PA coil had clearly higher |BR(-) | profiles compared to the 8-channel PA coil. The results of the 7-T in vivo experiment showed that the proposed combination of the DH Tx-...Continue Reading

References

Nov 1, 1990·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·P B RoemerO M Mueller
Aug 1, 1986·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·W A EdelsteinR W Redington
May 23, 1998·NMR in Biomedicine·S M Wright, L L Wald
Jul 31, 2001·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·M AlecciP Jezzard
Apr 30, 2002·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Qing X YangWei Chen
Jan 24, 2003·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Marcello AlecciPeter Jezzard
Jan 6, 2004·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Jacco A de ZwartJeff H Duyn
Feb 28, 2004·Journal of Magnetic Resonance·James Tropp
Aug 31, 2004·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Michael A OhligerDaniel K Sodickson
Aug 31, 2004·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Haydar CelikErgin Atalar
Sep 25, 2004·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Yudong ZhuNeil M Rofsky
Jan 25, 2005·Journal of Magnetic Resonance Imaging : JMRI·Christopher M CollinsMichael B Smith
Jun 22, 2005·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·G C WigginsL L Wald
Nov 5, 2005·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Pierre-François Van de MoorteleKāmil Uğurbil
Jun 13, 2006·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·G C WigginsL L Wald

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Citations

Aug 19, 2015·Microscopy Research and Technique·Samjin ChoiYoung-Guk Park

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