分析了系统杂散光的来源，得出非成像光束对系统影响较大、平板玻璃窗产生的鬼像不容忽视的结论。

We analyzed the stray light source of system and drew a conclusion that non-image beam has great effect on system qualities and system ghost images caused by parallel Windows should not be ignored.

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针对永磁型MRI系统设计了一种平板式匀场线圈，用以改善成像区的磁场均匀性。

A set of tabulate shim coils is designed to improve the homogeneity of the imaging field for permanent magnet MRI (Magnetic Resonance imaging) system.

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目的通过对平板探测器DSA系统与传统DSA系统冠状动脉造影图像质量进行比较和分析，评价平板dsa系统成像质量和临床应用。

Objective to evaluate the imaging quality and utility of flat panel detector DSA through comparing and analysing the image of coronary arteriography in traditional DSA and flat panel DSA.

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