| 计算机放射成像系统几何畸变的测试和分析 |
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| 引用本文： | 冯树理,张志广,白净.计算机放射成像系统几何畸变的测试和分析[J].清华大学学报(自然科学版),2004,44(9):1293-1296. |
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| 作者姓名： | 冯树理 张志广 白净 |
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| 作者单位： | 1. 首都医科大学,宣武医院医学影像中心,北京,100053
2. 清华大学,生物医学工程系,北京,100084 |
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| 基金项目： | 首都医学科研发展基金项目 ( 2 0 0 2 -2 0 2 1) |
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| 摘 要： | 计算机放射图像 CR(computer radiography)的几何畸变是评价其成像质量的重要指标。该文建立了二次排序计算 CR成像系统椭圆形几何畸变的方法。应用此方法 ,对相同成像条件下的乳腺 CR成像和 X线照片的椭圆形畸变进行了测试和比较 ,结果显示乳腺 CR成像的椭圆形畸变要比X线照片大。通过对 5 6幅 CR图像的测试 ,得到 CR图像的几何畸变在人眼视觉允许的范围内 ,表明 CR乳腺成像可以用于临床的乳腺检查
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| 关 键 词： | 计算机放射图像 几何畸变 乳腺X线成像 |
| 文章编号： | 1000-0054(2004)09-1293-04 |
| 修稿时间： | 2003年12月9日 |
Analysis and measurement of geometrical distortion of computer radiographs |
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| FENG Shuli,ZHANG Zhiguang,BAI Jing.Analysis and measurement of geometrical distortion of computer radiographs[J].Journal of Tsinghua University(Science and Technology),2004,44(9):1293-1296. |
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| Authors: | FENG Shuli ZHANG Zhiguang BAI Jing |
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| Institution: | FENG Shuli~1,ZHANG Zhiguang~2,BAI Jing~2 |
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| Abstract: | Geometric distortion is one of the most important criteria for evaluating computer radiography (CR) imaging quality. A two-step sort order method was developed to calculate the elliptical geometrical distortion in an X-ray image. The method was used to calculate the geometric distortion of CR mammogram images. The measured data was then compared with standard mammograms with the same imaging conditions. Analysis of 56 CR images indicated that the geometrical distortion was less then the geometrical distortion detectable by the human eye. The results demonstrate that CR images are suitable for diagnosis of breast cancer. |
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| Keywords: | computer radiography (CR) geometrical distortion mammography |
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