一种三维PET图像盲恢复方法  

A Blind Restoration Method of Three Dimensional Positron Emission Tomography Image

作　　者：张剑戈[1] 王成[1] 章鲁[1] 

机构地区：[1]上海交通大学基础医学院,上海200025

出　　处：《上海交通大学学报》2009年第7期1167-1171,共5页Journal of Shanghai Jiaotong University

基　　金：上海市教委重点学科资助项目(ZDXK2001)

摘　　要：为提高三维采集模式下正电子发射计算机断层(PET)图像的质量,提出了一种图像自动盲恢复的方法,从降质后的PET图像一维频域信号中估计出Levy分布的参数,使用点扩展函数的估计值恢复PET图像.实验结果表明,该方法增强了PET图像的结构细节,明显改善了图像的视觉效果.In order to deblur positron emission tomography （PET） image from three dimensional collection modal, an automatic blind image restoration method was established. The point spread function of PET imaging can be expressed as convolutions of three dimensional symmetric Levy density function. Methods were developed that can detect the Levy function from one-dimensional Fourier analysis of the blurred PET image. A separate image deblurring technique uses this detected point spread function to deblur the image. As a result, this method is used to deblur the PET images of patients and system models. The processing of these images enhances structural detail, leading to noticeable improvements in visual quality.

关 键 词：图像恢复 正电子发射计算机断层 图像 Levy分布 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]