为对微聚焦X射线相衬成像技术应用于双层以及多层塑料靶丸成像和特征分析进行可行性研究,基于类同轴X射线成像技术,综合考虑成像放大倍数、分辨率和衬度等因素,选择合适的实验参数,成功获得了较为清晰的双层塑料靶丸X射线相衬成像照片;采用数字图像处理技术的图像分割手段,如拉普拉斯高斯边缘检测法等对所成像中靶丸边界特征进行分析处理,获得了双层靶丸内层厚度为(10.5±0.6) μm,外层厚度为(9.2±0.7) μm,靶丸外径为(273.3±1.0) μm等参数。

For the feasibility study of microfocus X-ray phase contrast imaging in double and multi-layer plastic microsphere imaging and analysis,the images with clear characteristics of the double-layer plastic microsphere were obtained by choosing suitable experimental parameters on the consideration of imaging magnification,resolution,contrast and other factors,and based on in-line X-ray phase contrast imaging technique.Characteristic parameters of the double-layer microsphere,including inner layer thickness of (10.5 ± 0.6) μm,outer layer thickness of (9.2 ± 0.7) μm and external diameter of (273.3 ± 1.0) μm,were obtained by the use of segmentation methods,such as the Laplacian of Gaussian edge detection used to get the edges of each layer.