基于LC-SLM的CT图像全息三维重构与实时显示

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。

Three-dimension reconstruction and real-time display of CT images using holography based on LC-SLM

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 informations 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.