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针对光栅X射线相位衬度成像技术中如何获取高辐射通量和高空间相干的台式X射线源的问题,研制一种桌面X射线源.与传统X射线源不同,其阳极采用平行深沟道阵列的结构靶,灯丝发出的电子经加速聚焦后作用于结构靶,产生高辐射通量的一维相干X射线,其焦斑呈平行线阵列结构分布.将这种X射线管用于基于光栅的X射线相衬成像系统的光源,利用5步相移法得到了新鲜鸡翅的X射线相衬图像照片.
Aiming at the problem of how to obtain the high radiation flux and the high spatial coherence of the desktop X-ray source in the grating X-ray phase contrast imaging technology, a desktop X-ray source is developed. Unlike the traditional X-ray source, its anode adopts a parallel deep trench The structure of the array target, the filament emitted by the electronic focus on the structure of the target after the target, resulting in high radiant flux of one-dimensional coherent X-ray, the focal spot was parallel to the line array structure of the X-ray tube for grating-based X-ray phase contrast imaging system of light source, the use of 5-step phase shift obtained fresh chicken wings X-ray phase contrast image.