| 计算机X射线影像（CR）图像质量原理和测试方法 |
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| 引用本文： | 孙恺欣,陈欣,丁国清,颜国正.计算机X射线影像（CR）图像质量原理和测试方法[J].电子设计工程,2014(21):142-144. |
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| 作者姓名： | 孙恺欣 陈欣 丁国清 颜国正 |
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| 作者单位： | 上海交通大学 上海 200240 |
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| 摘 要： | 针对计算机X射线影像（CR）扫描仪研发过程中对图像质量评价的需要，对CR图像质量原理进行了研究和归纳，并总结了一套测试方法。测试方法涵盖了CR图像质量中最常用的几个指标：空间分辨率、对比度分辨率、空间精度、图像噪声、CNR、量子探测效率（DQE）、MTF、伪影和擦除率等。根据这套测试方法对某CR原型机进行了验证，满足了设计和制作过程中对图像质量评价的需要。
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| 关 键 词： | 计算机X射线影像 CR 图像质量 空间分辨率 DQE 噪声 |
Computed Radiography (CR) omage quality theory and test methods |
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| SUN Kai-xin,CHEN Xin,DING Guo-qing,YAN Guo-zheng.Computed Radiography (CR) omage quality theory and test methods[J].Electronic Design Engineering,2014(21):142-144. |
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| Authors: | SUN Kai-xin CHEN Xin DING Guo-qing YAN Guo-zheng |
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| Affiliation: | (Shanghai Jiaotong University, Shanghai 200240, China) |
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| Abstract: | Image quality （IQ） evaluation process is required for the development of computed radiography （CR） scanner. The theory of CR image quality was studied and a set of test methods were made. The CR test method covers the most commonly used image quality indicators：spatial resolution, contrast resolution, spatial accuracy, image noise, CNR, detective quantum efficiency （DQE）, MTF, artifacts and erasing rate. A CR enginnering model was validated based on this test method. The test method meets the requirement of IQ evaluation for design and production process. |
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| Keywords: | computed radiography CR image quality spatial resolution DQE noise |
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