在X射线透射成像过程中,结构间的相互遮挡导致图像信息混叠,为获取不同深度的结构信息往往需要采用计算机断层扫描(CT)的方法,但是效率偏低。针对上述问题,提出了基于多线扫描的X射线聚焦成像算法,仅需场景目标沿直线通过检测区域,便可提取多视角信息,利用光场重建理论实现指定深度结构的去遮挡重建,具有较高的实时性。对目标的多线扫描和X射线重建结果表明:所提方法可实现任意指定深度层信息的重建,对相互遮挡的目标结构能进行快速成像检测,并提升被遮挡目标的识别性,具有较好的应用前景。

In the process of X-ray transmission imaging, the mutual shielding between the structures leads to the overlapping of image information. In order to obtain the structural information at different depths, the method of computed tomography (CT) is often needed, but its efficiency is low. Aiming at the above problem, an X-ray focusing imaging algorithm based on multi-line scanning is proposed. As long as the scene targets pass through the detection area along a straight line, the multi-view information can be extracted, and the reconstruction of the specified depth structure is thus realized with a high real-time performance by using the optical field reconstruction theory. The multi-line scanning and X-ray reconstruction results of targets show that the proposed method can be used to reconstruct the information of any specified depth layer, for the rapid imaging detection of the structure of mutually occluded targets, and to improve the recognition of occluded targets, and thus it has a good application prospect.