基于LC-SLM的CT图像全息三维重构与实时显示

摘要

提出了一种将计算全息技术与液晶空间光调制器相结合的CT图像三维重构与实时显示的方法。用计算全息技术对一系列CT图片进行三维信息融合，并根据CT图片数目的不同，制作了不同的计算全息图，基于CT图片本身是数字化二维图像的特点，采用了快速傅里叶变换算法。用液晶空间光调制器作为全息图显示载体，设计了CT图像三维实时显示系统，利用计算机控制实时输出不同的计算全息图到空间光调制器，通过光学再现获得不断变化的三维再现像，实现CT图像的三维实时显示。%Combining computer-generated holography with liquid crystal spatial light modulator (LC-SLM),a new method for three-dimension reconstruction and real-time display of CT images is proposed.The two-dimension infor-mations of a series of CT images are transformed into three-dimension informations,and a series of different computer-generated holograms which are connected with the number of CT images are obtained by computer.In the process, Fast-Fourier-transform algorithm is used to speed up the calculation by taking full advantage of the characteristic that CT images are digital two-dimension images.The three-dimension digital real-time display system of CT images is set up,in which the traditional holographic plate is replaced by LC-SLM.Controlled by computer,holograms are sent to LC-SLM in sequence,the three-dimensional reconstructed images that change with the holograms are observed,and the real-time display of three-dimensional CT images is realized.