Polarization of the RF field in a human head at high field: A study with a quadrature surface coil at 7.0 T

Jinghua Wang; Qing Yang; Xiaoliang Zhang; Christopher M. Collins; Michael B. Smith; Xiao Hong Zhu; Gregor Adriany; Kamil Ugurbil; Wei Chen

doi:10.1002/mrm.10197

Polarization of the RF field in a human head at high field: A study with a quadrature surface coil at 7.0 T

Jinghua Wang, Qing Yang, Xiaoliang Zhang, Christopher M. Collins, Michael B. Smith, Xiao Hong Zhu, Gregor Adriany, Kamil Ugurbil, Wei Chen

Research output: Contribution to journal › Article › peer-review

63 Scopus citations

Abstract

The RF field intensity distribution in the human brain becomes inhomogeneous due to wave behavior at high field. This is further complicated by the spatial distribution of RF field polarization that must be considered to predict image intensity distribution. An additional layer of complexity is involved when a quadrature coil is used for transmission and reception. To study such complicated RF field behavior, a computer modeling method was employed to investigate the RF field of a quadrature surface coil at 300 MHz. Theoretical and experimental results for a phantom and the human head at 7.0 T are presented. The results are theoretically important and practically useful for high-field quadrature coil design and application.

Original language	English (US)
Pages (from-to)	362-369
Number of pages	8
Journal	Magnetic Resonance in Medicine
Volume	48
Issue number	2
DOIs	https://doi.org/10.1002/mrm.10197
State	Published - 2002

All Science Journal Classification (ASJC) codes

Radiology Nuclear Medicine and imaging

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10.1002/mrm.10197

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abstract = "The RF field intensity distribution in the human brain becomes inhomogeneous due to wave behavior at high field. This is further complicated by the spatial distribution of RF field polarization that must be considered to predict image intensity distribution. An additional layer of complexity is involved when a quadrature coil is used for transmission and reception. To study such complicated RF field behavior, a computer modeling method was employed to investigate the RF field of a quadrature surface coil at 300 MHz. Theoretical and experimental results for a phantom and the human head at 7.0 T are presented. The results are theoretically important and practically useful for high-field quadrature coil design and application.",

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AU - Wang, Jinghua

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AU - Collins, Christopher M.

AU - Smith, Michael B.

AU - Zhu, Xiao Hong

AU - Adriany, Gregor

AU - Ugurbil, Kamil

AU - Chen, Wei

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N2 - The RF field intensity distribution in the human brain becomes inhomogeneous due to wave behavior at high field. This is further complicated by the spatial distribution of RF field polarization that must be considered to predict image intensity distribution. An additional layer of complexity is involved when a quadrature coil is used for transmission and reception. To study such complicated RF field behavior, a computer modeling method was employed to investigate the RF field of a quadrature surface coil at 300 MHz. Theoretical and experimental results for a phantom and the human head at 7.0 T are presented. The results are theoretically important and practically useful for high-field quadrature coil design and application.

AB - The RF field intensity distribution in the human brain becomes inhomogeneous due to wave behavior at high field. This is further complicated by the spatial distribution of RF field polarization that must be considered to predict image intensity distribution. An additional layer of complexity is involved when a quadrature coil is used for transmission and reception. To study such complicated RF field behavior, a computer modeling method was employed to investigate the RF field of a quadrature surface coil at 300 MHz. Theoretical and experimental results for a phantom and the human head at 7.0 T are presented. The results are theoretically important and practically useful for high-field quadrature coil design and application.

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Polarization of the RF field in a human head at high field: A study with a quadrature surface coil at 7.0 T

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