期刊文献+

高场磁共振成像常见伪影与消除分析 被引量:7

Performance and Measures of Common Artifacts in High-field MRI
下载PDF
导出
摘要 目的研究高磁共振成像(MR I)伪影产生的机理,表现特点和处理方式。方法回顾性分析对188例采用GE-HDe 1.5T超导磁共振扫描的伪影图像进行分类并分析原因。结果将伪影归纳为四大类:运动伪影;与磁场和梯度场有关的伪影;化学位移伪影;卷褶伪影和部分容积效应伪影。一般的伪影可根据诊断的需要采用不同的方法加以克服。与磁场和梯度场有关的伪影在去除外界因素干扰仍无法改善时,则请专业的技术人员进行判断和维护。结论分析1.5T磁共振伪影产生的机理,对改善图像质量,提高诊断率具有重要意义。 Objective To study the mechanism, perfomance and measurement of artifacts in high-field MRI. Methods To analyze 188 MRI images which have the different artifacts underwent GE-HDe 1.5T MRI. Results There were four different artifacts:motion artifact; magnetisability artifacts;chemical -shift artifact;fold volume and partial volume effect artifacts. We can improve the figure quality according to the different diagnosis objects except the professiohal question which need the help from professional engineer, Conclusion Knowing the mechanism of causing artifacts in 1.5T MR, the effective methods can be gotten and the imaging quality may be better in high field MRI.
出处 《中南医学科学杂志》 CAS 2011年第3期296-298,共3页 Medical Science Journal of Central South China
关键词 MRI 1.5 T磁共振扫描 MRI伪影 影像质量 MRI 1.5T MR scanning MR artifact image quality
  • 相关文献

参考文献7

二级参考文献53

  • 1侯正松,江贵平,王华峰,陈武凡.MR图像刚性平移运动伪影的自动逆向迭代修正[J].中国生物医学工程学报,2004,23(4):353-358. 被引量:9
  • 2Nakada T. Clinical experience on 3.0 T systems in Niigata, 1996 to 2002. Invest Radiol, 2003, 38(7): 377-384.
  • 3Nael K, Fenchel MC, Kramer U, et al. Whole-body contrast-enhanced magnetic resonance angiography: new advances at 3.0 T. Top Magn Reson Imaging, 2007, 18(2): 127-134.
  • 4Nakada T. Clinical application of high and ultra high-field MRI. Brain & Development, 2007, 29(6): 325-335.
  • 5Yablonskiy DA, Ha-acke EM. Theory of NMR signal behavior in magnetically inhomogeneous tissues: the static dephasing regime. Magn Reson Med, 1994, 32(6): 749-763.
  • 6Bemstein MA, Huston III J, Ward HA. Imaging artifacts at 3.0 T. J Magn Reson Imaging, 2006, 24(4): 735-746.
  • 7Merkle EM, Dale BM, Thomas J, et al. MR liver imaging and cholangiography in the presence of surgical metallic clips at 1.5 and 3 T. Eur Radiol, 2006, 16(10): 2309-2316.
  • 8Graf H, Lauer UA, Berger A, et al. RF artifacts caused by metallic implants or instruments which get more prominent at 3 T: an in vitro study. Magn Reson Imaging, 2005, 23(3): 493-499.
  • 9Wieben O, Francois C, Reeder SB. Cardiac MRI of ischemic heart disease at 3 T: potentials and challenges. Eur J Radiol, 2008, 65(1): 15-28.
  • 10Deshpande VS, Shea SM, Li D. Artifact reduction in true-FISP imaging of the coronary arteries by adjusting imaging frequency. Magn Reson Med, 2003, 49(5): 803-809.

共引文献34

同被引文献64

引证文献7

二级引证文献40

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部