结果直接成像系统具有曝光剂量小、图像质量佳等饰点，其甲级片率达到91.3%。

Resu lts The direct digital imaging system had the advantages of low exposure dose and good image quality. The first film rate was 91.3%.

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观测系统的设计则直接影响到地震资料采集质量的好坏，影响地下构造的成像效果。

Design of the receiver system affects the quality of seismic collecting data directly, and affects the imaging of underground construction.

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提出了直接积分法(DIM)研究动态电子光学成像系统时间像差的理论。

A new theory for studying temporal aberrations of dynamic electron optical imaging systems by the direct integral method (DIM) is put forward.

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