介绍了一种高能闪光照相系统的光源位置重复性测量方法。相同客体不同次实验图像的位置可以反映闪光照相系统的光源位置重复性。首先从球形客体实验图像中检测出客体的钨飞层外界面,然后利用界面数据拟合得到对应的圆心位置。多次照相图像圆心位置的重复性反映了光源位置的重复性。实验测量了闪光照相系统的光源位置重复性,实验结果表明,某闪光照相系统光源位置的重复性好于0.1 mm。

The measurement of repeatability for X-ray source position between several experiments was proposed. The difference between several images of the same object indicated the repeatability of the X-ray source position. First, a shell object was radiographed several times to get several images. And then the edge of each image was detected. By fitting the edge data of the image, the center position of the object in each experiment was obtained. The dataset of the center position showed the repeatability of the X-ray source position. The experiment results showed that the shift of the X-ray source position was less then 0.1 mm.