Improved scanning measurement in optical CT

doi:10.3778/j.issn.1002-8331.2008.28.064

Computer Engineering and Applications ›› 2008, Vol. 44 ›› Issue (28): 193-195.DOI: 10.3778/j.issn.1002-8331.2008.28.064

• 工程与应用 • Previous Articles Next Articles

Improved scanning measurement in optical CT

ZHOU Lin,LI Chun-fang,CHEN Fang-qiang

College of Electronic Information Engineering，South Central University for Nationalities，Wuhan 430074，China

Received:2008-04-02 Revised:2008-06-10 Online:2008-10-01 Published:2008-10-01
Contact: ZHOU Lin

一种改进的光学CT扫描测量方法

周林,李春芳,陈方强

中南民族大学电子信息工程学院，武汉 430074

通讯作者: 周林

Abstract

Abstract: The scanning measurement in optical CT calculates the length of ray across the pixel rapidly and accurately by using the coordinate intersected by the ray and the parallel to the reference frame.In frequency spectrum analysis for image reconstruction，this length is used to compute the projection vector of the original image，and afterwards，establish the firm ground for the reconstruction image approaching the original image.The computer simulation shows that this measurement speeds up the reconstruction by reducing the 2-D Fourier series and improves the precision.

Key words: Computerized Tomography scanning, frequency spectrum analysis, image reconstruction, projection vector, Fourier series

摘要： 改进的光学CT扫描测量方法利用扫描线与平行于两坐标轴的平行线束交点坐标，快速精确计算出扫描线穿过每个像素格子的长度。在FSART（频谱分析图像重建）算法中，使用此长度可以精确地得到原始图像的投影向量，为后续重建图像更快更准地逼近原始图像打下坚实的基础。计算机仿真结果表明，该方法可以降低图像函数二维傅里叶级数展开的阶数即加快计算速度，重建的精度也有一定的提高。

关键词: CT扫描, 频谱分析, 图像重建, 投影向量, 傅里叶级数

ZHOU Lin,LI Chun-fang,CHEN Fang-qiang. Improved scanning measurement in optical CT[J]. Computer Engineering and Applications, 2008, 44(28): 193-195.

周林,李春芳,陈方强. 一种改进的光学CT扫描测量方法[J]. 计算机工程与应用, 2008, 44(28): 193-195.

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Improved scanning measurement in optical CT

一种改进的光学CT扫描测量方法

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