| 投影数据预处理三维CT重构算法研究 |
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| 引用本文： | 王朕,王明泉.投影数据预处理三维CT重构算法研究[J].半导体技术,2007,32(7):622-625. |
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| 作者姓名： | 王朕 王明泉 |
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| 作者单位： | 1. 中北大学,仪器科学与动态测试教育部重点实验室,太原,030051
2. 清华大学,工程物理系,北京,100084 |
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| 基金项目： | 中国博士后科学基金
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山西省自然科学基金
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中北大学校科研和教改项目 |
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| 摘 要： | 大面积非晶硅平板探测器在工业透射射线成像领域得到越来越多的应用.基于FPD的圆轨道FDK型三维计算机层析成像技术(3D-CT)检测速度快,但成像质量不及2D-CT.为发挥3D-CT速度优势,抑制噪声,同时提高图像重建的质量,以由平板探测器得到的二维投影数据为研究对象,提出了一种对投影数据进行小波分解,分别对高频和低频进行两次滤波的投影预处理方法,然后将分别重建的图像叠加,最终得到高质量的重建图像.算法的仿真实验结果表明,重建图像质量得到明显改善,系统噪声得到抑制.
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| 关 键 词： | 三维重建 平板探测器 投影预处理 投影数据 数据预处理 三维 算法研究 Data Projection Decomposition Multiscale Wavelet Based Reconstruction Algorithm Image 系统噪声 改善 图像质量 结果 仿真实验 重建图像 图像叠加 预处理方法 |
| 文章编号： | 1003-353X（2007）07-0622-04 |
| 修稿时间： | 2006-12-27 |
Research on 3D-CT Image Reconstruction Algorithm Based on Wavelet Multiscale Decomposition FPD Projection Data Pre-Procession |
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| WANG Zhen,WANG Ming-quan.Research on 3D-CT Image Reconstruction Algorithm Based on Wavelet Multiscale Decomposition FPD Projection Data Pre-Procession[J].Semiconductor Technology,2007,32(7):622-625. |
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| Authors: | WANG Zhen WANG Ming-quan |
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| Affiliation: | 1. The Ministry Education Key Lab for Instrumentation Science and Dynamic Test, North University of China, Taiyuan 030051, China; 2.Department of Engincering Physics, Tsinghna University, Beijing 100084, China |
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| Abstract: | Large-area a-Si X-ray flat panel detector(FPD) is becoming more and more popular in the field of industry transmission radiation imaging.FDK-type three dimensional computed tomography(3D-CT) with circular orbit based on FPD can execute inspection rapidly,but its imaging quality can not reach that of 2D-CT.In order to make the best of the speed advantage of 3D-CT and improve the quality of the reconstructed image,at the same time reduce the noise,the research object is 2D projection data from FPD,projection pre-procession method that the projection data was filtered twice in highfrequency and low-frequency respectively with wavelet multiscale decomposition were proposed,then the two reconstructed images were added to make the high quality reconstructed image.The result of algorithm simulation shows the image quality is improved and the system noise is reduced apparently. |
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| Keywords: | 3D reconstruction flat panel detector(FPD) projection pre-procession |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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