| 吴前芝殷信道王书智毛存南顾建平△.化学饱和法脂肪抑制技术在上腹部MRCP 成像中的应用[J].,2012,12(2):284-286 |
| 化学饱和法脂肪抑制技术在上腹部MRCP 成像中的应用 |
| Nanjing First Hospital of Nanjing Medical University, Divisionof Radiation Imaging |
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| DOI： |
| 中文关键词: 磁共振成像 自动匀场 肝脏 |
| 英文关键词: Magnetic resonance imaging Automatic shimming Liver |
| 基金项目: |
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| 中文摘要: |
| 目的：探讨化学饱和法脂肪抑制技术在上腹部磁共振检查中的应用。材料与方法：使用的机器为美国马可尼公司生产的
Elips 1.5T 磁共振成像仪，常规检查上腹部病人，研究对象的条件：在自动匀场时出现单水峰的位置与Y 轴不重叠，选择40 例病
人做两次扫描，第一次是匀场自动完成后进行扫描；第二次是在匀场时通过人为的干预，使得FID 最大的水峰调整到Y 轴上，提
交后进行扫描，对40 例的图像进行自配对，比较压脂图像质量。结果：压脂序列图像：自动匀场完成后重T2 加权T2/C 薄层图像
均含有脂肪信号，经最大信号投影重建胰胆管图像也含有脂肪信号，整体图像对比度差；经人工干预手动调节使水峰的最高点与
Y 轴重叠,扫描所得图像不含脂肪信号。结论：快速动态自动匀场可以使MRI 图像质量得到显著改善，在自动匀场时通过人工的
干预可获得高质量的压脂图像是必需的。 |
| 英文摘要: |
| Objective: To investigate the automatic shimming of the upper abdomen Magnetic Resonance Imaging application.
Methods: Using the machine for the American Marconi company's Elips 1.5T magnetic resonance imaging, routine checks on the
abdomen of patients, study conditions: when the automatic shimming more water peak or a single water peak position and Y-axis do not
overlap, 40 cases were selected to do two scans, the first shim automatically after the scan; second time was when the man in the uniform
field adjustment, making the largest water peak FID adjusted to Y axis, the author After scanning the images of 40 patients from the
match and compare image quality and image quality pressure grease. Results: The two scans of conventional image quality was of no
significant difference; pressure grease image sequences: automatic shimming after heavy T2-weighted T2 / C thin images contain fat
signal, the maximum signal by projection reconstruction images also contain fat and pancreatic duct signal The overall image contrast is
poor; through human intervention to manually adjust to the highest water peak overlaps with the Y axis, scanning the image obtained
without fat signal. Conclusion: The automatic shimming fast dynamic MRI image quality can be significantly improved, when in the
automatic shimming of the human intervention available through the pressure of high-quality images is essential fat. |
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