无介电垫(注意信号丢失)
带电介质垫(改进)
References
Sled JG, Pike GB. Standing-wave and RF penetration artifacts caused by elliptic geometry: an electrodynamic analysis of MRI. IEEE Trans Med Imag 1998; 17: 653-662.
Webb AG. Dielectric materials in magnetic resonance, Concepts Magn Reson 2011; 38A:148-184.
Yang QX. Mao W, Wang J et al. Manipulation of Image Intensity Distribution at 7.0: Passive RF Shimming and Focusing With Dielectric Materials. J Magn Reson Imaging 2006;24:197–202.
Yang QX, Wang J, Wang J, et al. Reducing SAR and enhancing cerebral signal-to-noise ratio with high permittivity padding at 3T. Magn Reson Med 2011; 65:358-362
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