| 杨娉娉,尹红霞,刘雅文,朱建明,杨正汉,王振常.MRI设备磁场均匀性评估方法探讨及实践[J].中国医学影像技术,2017,33(11):1611~1614 |
| MRI设备磁场均匀性评估方法探讨及实践 |
| Investigation and practice of magnetic field homogeneity evaluation methods for MRI equipment |
| 投稿时间：2017-06-12 修订日期：2017-09-11 |
| DOI：10.13929/j.1003-3289.201706073 |
| 中文关键词: 磁场均匀性 磁共振波谱 带宽差值法 |
| 英文关键词:Magnetic field homogeneity Magnetic resonance spectroscopy Bandwidth difference |
| 基金项目:国家重点研发计划数字诊疗装备研发重点专项（2016YFC0106901）、科技北京百名领军人才培养工程（Z141107001514002）、北京市医管局"使命"人才计划（SML20150101）、北京学者（京人社专家发[2015]160号）。 |
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| 中文摘要: |
| 目的 探讨MRI设备磁场均匀性评估方法与实践操作步骤，为临床质量控制提供技术参考。方法 基于MRS模体和32 cm的匀场球模，分别采用波谱峰值法和带宽差值法两种磁场均匀性检测方法检测本单位放射科的MRI设备。结果 MRS模体的半高宽值为0.08 ppm，32 cm匀场球模在带宽差值法下单层冠状位，矢状位和轴位的磁场不均匀值分别为0.15 ppm、0.08 ppm和0.18 ppm。结论 所检测MRI设备磁场均匀性良好，符合磁场均匀性检测标准。 |
| 英文摘要: |
| Objective To explore the evaluation methods of magnetic field uniformity and the practical operations, in order to provide references for clinical quality control. Methods Based on MRS phantom and 32 cm uniform spherical phantom, the evaluation methods of magnetic field uniformity were used to detect MRI equipment in department of radiology, including spectral peak and the bandwidth difference. Results The full width at half maximum (FWHM) of MRS phantom was 0.08 ppm, the inhomogeneity values on coronal, sagittal and axial detected by the bandwidth difference method was 0.15 ppm, 0.08 ppm and 0.18 ppm, respectively. Conclusion The magnetic field homogeneity of the above mentioned MRI equipment is favorable, which accords with magnetic field uniformity detection standard. |
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