利用对比剂首次通过法可进行MR肺灌注成像。
The MR pulmonary perfusion imaging was achieved by the first-pass contrast agent method.
通过分析当前在心理系统中应用层次分析法存在的问题，首次提出了应用层次分析法来为心理系统建立最优心理结构的设想。
Pointing out problems in the application of AHP in the psychic system, and exploring the feasible way of establishing the best psychic structure by AHP for the first time.
首次在有限视场的输入景物下通过移动刀刃法对扫描成像过程中垂直扫描方向系统像方MTF的检测进行了分析和模拟计算。
Under the input scenery with finite visual field, the analyses and simulative calculation of the image side OTF of vertical direction of the scanning image by moving blade have been done firstly.
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