超过此密度后，微波场在表面快速衰减，气体电离主要在表面进行。
Above this density, microwave field will damp rapidly, so the gas ionization is mainly on the surface.
目的评价液体衰减反转恢复(FLAIR)序列在低场MR中对脑梗塞的应用价值。
Objective: to evaluate the application of fluid-attenuated inversion-recovery (FLAIR) sequence to cerebral infarction in low field MR.
蒙特卡罗模拟提供了一种定性研究MRI和NMR中非均匀场梯度扩散衰减的方法。
Monte Carlo simulation provides an alternate way to quantify the effects of inhomogeneous field gradients used in MRI and NMR.
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