Helmholtz transceiver array for improving the vertical bar B-1 vertical bar-field homogeneity at 7-T magnetic resonance imaging
- Authors
- Seo, J. -H.; Song, H.; Kim, H. J.; Han, S. -D.; Heo, P.; Kim, D.; Ryu, Y.; Kim, K. -N.
- Issue Date
- Apr-2017
- Publisher
- ALLERTON PRESS INC
- Citation
- PHYSICS OF WAVE PHENOMENA, v.25, no.2, pp.147 - 150
- Journal Title
- PHYSICS OF WAVE PHENOMENA
- Volume
- 25
- Number
- 2
- Start Page
- 147
- End Page
- 150
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/6286
- DOI
- 10.3103/S1541308X17020121
- ISSN
- 1541-308X
- Abstract
- A 16-channel transceiver radiofrequency (RF) array using Helmholtz coils was designed to improve the RF transmission vertical bar B-1(+)vertical bar-field homogeneity for human brain magnetic resonance imaging (MRI) at 7 T. A numerical simulation of the proposed Helmholtz transceiver array was performed using the finite-difference time-domain method-the subset of the finite-element method simulation. The simulation results of proposed 16-channel Helmholtz transceiver array were compared with the generally used rectangular transceiver array in term of their vertical bar B-1(+)vertical bar-field and specific absorption rate (SAR). The simulation of each single element in 16-channel Helmholtz and rectangular transceiver arrays was compared using water phantom in term of their magnetic flux vertical bar B-1 vertical bar homogeneity for the full width at half maximum. From the simulation results, the proposed 16-channel Helmholtz transceiver array configuration offers superior vertical bar B-1(+)vertical bar-field homogeneity and low SAR at 7 T. These modifications to the coil geometries of the transceiver array coil could be applied to a 7-T MRI, and also extended to increase the homogenous coverage on vertical bar B-1(+)vertical bar field with low SAR.
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Collections - 보건과학대학 > 의용생체공학과 > 1. Journal Articles
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