为了获得高能X射线、α射线、γ射线和中子等粒子源的边缘增强图像,提出一种以螺旋波带片编码成像(ZPCI)技术。螺旋波带片同时具备径向希尔伯特变换和菲涅耳波带片聚焦的特点,因此,该技术相当于在采用菲涅耳ZPCI技术获得解码图像的基础上再进行一次径向希尔伯特变换。对该技术产生的边缘增强图像进行模拟计算和实验诊断,结果显示具有可行性。该技术在天文学、核医学和激光惯性约束聚变研究等领域具有广泛的应用前景。

To obtain edge-enhancement images of particle sources, such as high-energy X-rays, α-rays, γ-rays, and neutrons, we propose a spiral zone plate coded imaging (ZPCI) technique, which takes the spiral zone plate as the coded aperture. The spiral zone plate has the properties of both radial Hilbert transformation and Fresnel zone plate focusing, which is equivalent to a further radial Hilbert transformation of the decoded image obtained by Fresnel ZPCI technique. The feasibility of this proposed technique is verified via both numerical simulations and demonstrative experiments to generate edge-enhancement images. This technique can be widely used in many fields such as astronomy, nuclear medicine, and laser inertial confinement fusion.