| 锥束CT重建图像中环状伪影的拟合校正 |
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| 引用本文： | 罗守华,吴婧,张波,陈功.锥束CT重建图像中环状伪影的拟合校正[J].南京航空航天大学学报(英文版),2010,27(1):34-38. |
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| 作者姓名： | 罗守华 吴婧 张波 陈功 |
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| 作者单位： | 1. 东南大学生物医学工程学院,南京,210096,中国
2. 江苏省中医院信息工程部,南京,210029,中国 |
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| 基金项目： | Supported by the National Basic Research Program of China (“973”Program)(2006CB601201)~~ |
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| 摘 要： | 针对锥束CT图像重建中像元通道响应不一致引起的环状伪影原理进行了分析，采用了拟合校正的方法对投影图像进行校正。结果表明，校正后重建图像中的环状伪影得到有效抑制。在此基础上，进一步考虑像元通道对射线强度响应的非线性，以及像元通道对射线能谱响应的非线性等因素对重建图像的影响，最后讨论了拟合校正的改进方向。
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| 关 键 词： | 图像处理 图像重建 平板探测器 拟合校正方法 |
FITTING CORRECTION METHOD OF RING ARTIFACTS FOR RECONSTRUCTING CONE-BEAM CT IMAGES |
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| Luo Shouhua,Wu Jing,Zhang Bo,Chen Gong.FITTING CORRECTION METHOD OF RING ARTIFACTS FOR RECONSTRUCTING CONE-BEAM CT IMAGES[J].Transactions of Nanjing University of Aeronautics & Astronautics,2010,27(1):34-38. |
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| Authors: | Luo Shouhua Wu Jing Zhang Bo Chen Gong |
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| Institution: | 1.School of Biological Science & Medical Engineering/a>;Southeast University/a>;Nanjing/a>;210096/a>;P.R.China/a>;2.Information Engineering Department/a>;Jiangsu Provincial Hospital of TCM/a>;210029/a>;P.R.China |
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| Abstract: | In high-resolution cone-beam computed tomography (CBCT) using the flat-panel detector,imperfect or defect detector elements cause ring artifacts due to the none-uniformity of their X-ray response.They often disturb the image quality.A dedicated fitting correction method for high-resolution micro-CT is presented.The method converts each elementary X-ray response curve to an average one,and eliminates response inconsistency among pixels.Other factors of the method are discussed,such as the correction factor v... |
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| Keywords: | image processing image reconstruction flat-panel detector fitting correction method |
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