| 孙春发,俎栋林,赵旭娜.MR图像伪影与K-空间数据关系的研究[J].中国医学影像技术,2008,24(s1):235~237 |
| MR图像伪影与K-空间数据关系的研究 |
| Study on the relationship between artifacts of MR image and its K-space data |
| 投稿时间：2008-05-21 修订日期：2008-07-30 |
| DOI： |
| 中文关键词: 磁共振成像 K-空间 图像伪影 虚拟磁共振扫描仪 混叠 |
| 英文关键词:Magnetic resonance imaging K-space Virtual magnetic resonance scanner Aliasing |
| 基金项目: |
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| 摘要点击次数: 1563 |
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| 中文摘要: |
| 目的 研究MRI图像和K-空间数据之间的映射关系以及因K-空间数据有问题而引起的典型的图像伪影。 方法 给出K-空间及K-平面的定义,通过MRI模拟实验揭示K-空间数据的不同区域所包含的信息的差异。 结果 给出了K-空间数据丢失或欠采样所引起的各种伪影的特征。 结论 MR图像与K-空间数据之间满足傅立叶映射关系,了解K-空间的性质对于理解图像伪影产生的根源、校正图像畸变和伪影直接对k-空间数据进行处理有时候更方便、更有效。 |
| 英文摘要: |
| Objective To research the mapping relationship between MR image and its K-space data as well as some typical artifacts caused by error K-space data. Methods The definition of K-space and K-plane is given. Through MRI simulation experiments the difference of information in different regions of K-space data is revealed. Results Some aliasing artifacts caused by under-sampling K-space data are illustrated. The features of different artifacts caused by K-space data loss or under-sampling are presented. Conclusion It is important to understand the nature of K-space. It can help us better to comprehend the source of artifacts engendered. It is sometimes more convenient and efficient to manipulate K-space data in order to correct image deforming and eliminate image artifacts. |
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