X线机自动曝光控制电离室的研制及其特性研究

研制用于医用诊断Ｘ线机自动曝光控制用电离室，并对其各种输出特性进行了实验测量与研究。电离室中心电极采用了静电喷涂石墨电极，因此不会在胶片上形成影像，为增大电离室输出效率电离室采用复式结构，减小了电离室厚度与极间电容。研制的电离室可方便安装于不同Ｘ线机上，其输出信号与输入射线强度线性良好，线质响应均匀，输出时间响应线性良好。

The Development of the Ionization Chamber and the Researching of its Characteristics for Automatic Exposure Controlling in the Xray Diagnosis Machine

An ionization chamber for automatic exposure controlling used in X ray diagnosis machine was developped, and its characteristics were measured and researched. The electrodes of measuring field were made of cabon, such couldn't leave it's imaging on the film. In order to increase the ionization efficiency and decrease the thickness and electric capacity between electrods, the chamber was constructed in multilayers. The chamber we developped can be fixed in different x ray machines convientlly, there is a fine linearity between it's signal output and the exposures, the beam quality response is uniform and outputtiming response is also good.