医学层析图像的计算全息三维可视化  

Three Dimensional Visualization of Computer Tomograms Based on Computer Generated Holography

作　　者：杨上供[1] 甘亮勤[1] 熊飞兵[1] 

机构地区：[1]厦门理工学院福建省高校光电技术重点实验室,福建厦门361024

出　　处：《光电工程》2014年第12期33-38,共6页Opto-Electronic Engineering

基　　金：国家自然科学基金项目(11104234)

摘　　要：提出了一种医学层析图像的计算全息三维可视化技术。首先研究了层析图像序列的三维信息融合,将层析图像序列的二维信息融合成三维信息,用计算全息图的方法进行三维信息记录。然后结合空间光调制器的结构特性,对全息系统的空间频率、参物光夹角、取样间隔以及全息再现像的再现区域和视角等进行了讨论和分析,并设置了相关参数,使计算全息系统与电子显示系统相匹配。最后用液晶空间光调制器作为全息图显示载体,用计算机控制全息图的实时输出,用雾屏承载三维空间再现像,建立三维图像光电再现与实时显示系统,实现层析图像序列的三维可视化,给出了理论分析与实验结果。A new technology of three-dimension visualization of computer tomograms using computer generated holography is proposed. Firstly, information amalgamation of computer tomograms is studied, the three-dimension information extracted from a series of two-dimension computer tomograms is recorded by computer-generated holography, and different Computer-generated Holograms（CGHs） corresponding to different number of computer tomograms are obtained. Then, combining the structural features of Liquid Crystal Spatial Light Modulator （LC-SLM）, spatial frequency, angle between object and reference beams as well as sample interval of CGHs is analyzed, and the viewing angle of reconstructed image of CGHs is discussed. On this basis, relevant parameters are properly set making the holographic system and the liquid crystal display system match well. Finally, three-dimensional reconstructed and real-time display system for computer tomograms is build, in which, real-time controlled by computer, different CGHs are output to LC-SLM in sequence, and three-dimensional reconstructed images of computer tomograms changing with the holograms are dynamically displayed on fog screen. The principle and experiment result are given.

关 键 词：计算全息 CT 三维重建 实时显示 

分 类 号：TN27[电子电信—物理电子学]