Results: The distribution of number and inverse proportion of CT and MRI is reasonable in all levels and in all classes of hospital.

结果：CT、MRI在各级医院和各类医院的数量分布和比例分布较为合理。

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By the dual-energy ct method of nondestructive analysis, we can obtain the distribution images of both atomic number and electronic density or analysing petroleum core and distinguishing inclusions.

用该方法可得出检测样品的原子序分布图和电子密度分布图，用以分析油田岩芯以及区别其内含杂质。

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