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目的：研制适合医用诊断Ｘ线机的能谱测量系统，利用该系统研究不同附加滤过板对线质的影响。材料与方法：利用计算机和单道控制器控制已有的单元电路，线性放大器、能量甄别器对输入脉冲幅度扫描实现能谱测量，所测得的谱线面积代表射线强度，因此分析不同滤过下测得的谱线面积可找出对应某一管电压下的最佳滤过。结果与结论：所研制的能谱测量系统可由微机控制自动完成数据采集、分析、显示。对７０ＫＶ＿ｐ测量结果表明：２．０ｍｍＡｌ滤过为最佳值。
Objective: To develop an energy spectrum measuring system suitable for medical diagnostic X-ray machines and to study the influence of different additional filter plates on the line quality by using the system. Materials and Methods: The existing unit circuit, linear amplifier and energy discriminator were used to control the input pulse amplitude scanning by computer and single-channel controller to measure the energy spectrum. The area of the measured line represents the intensity of the radiation. Therefore, Under the measured line area can be found in a tube voltage corresponding to the best filtration. Results and Conclusion: The developed energy spectrum measurement system can be automatically controlled by computer to collect, analyze and display data. For 70KV_p measurement results show that: 2.0mmAl filtration is the best value.