| 尹红霞,刘雅文,杨娉娉,牛明哲,朱建明,王振常,杨正汉.正交鸟笼头线圈质量控制检测与建立处置界限的初步实践[J].中国医学影像技术,2018,34(1):123~127 |
| 正交鸟笼头线圈质量控制检测与建立处置界限的初步实践 |
| Initial practice on quality control tests and action limits setting of birdcage head coils |
| 投稿时间：2017-06-08 修订日期：2017-10-20 |
| DOI：10.13929/j.1003-3289.201706053 |
| 中文关键词: 线圈 质量控制 磁共振成像 性能评估 |
| 英文关键词:Coils Quality control Magnetic resonance imaging Performance evaluation |
| 基金项目:北京学者（京人社专家发[2015]160）、"使命"人才计划（SML20150101）、科技北京百名领军人才培养工程（Z141107001514002）、国家重点研发计划数字诊疗装备研发重点专项（2016YFC0106901）。 |
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| 中文摘要: |
| 目的 对正交鸟笼头线圈进行检测，设立其性能指标的处置界限，以建立有效的质量控制方法。方法 采用MR设备1（GE 1.5T HDi）、设备2（GE 3.0T HD）和设备3（GE 3.0T 750W）所配备的正交鸟笼头线圈对标准ACR模体行轴位T1W序列扫描，扫描6次检测SNR、图像均匀度百分比（PIU）和信号伪影百分比（PSG），计算其均值和标准差，建立每个指标的处置界限。结果 设备1、设备2和设备3正交鸟笼头线圈的SNR均值分别为262.14、280.47和474.24，标准差分别为18.43、29.67和29.95，建立的处置界限分别为 ≥ 225.28、≥ 221.13和 ≥ 414.34；PIU均值分别为95.00%、83.17%和84.33%，标准差分别为0.63%、1.17%和0.82%，建立的处置界限分别为 ≥ 93.74%、≥ 82.00%（修正后）和 ≥ 82.69%；PSG均值分别为0.11%、0.07%和0.14%，标准差分别为0.12%、0.03%和0.11%，建立的处置界限分别为 ≤ 0.35%、≤ 0.13%和 ≤ 0.36%。结论 3台设备正交鸟笼头线圈的SNR、PSG和PIU值均满足建立的处置界限要求。 |
| 英文摘要: |
| Objective To establish clinical quality control method with testing the birdcage head coils and setting up the action limits.Methods Three different MR devices (GE 1.5T HDi, GE 3.0T HD and GE 3.0T 750W) and corresponding birdcage coils were tested. Axial T1WI was performed to scan ACR phantom. SNR, percent image uniformity (PIU) and percent signal ghosting (PSG) were measured for six times, and the mean values and standard deviations (SD) were calculated. Based on the results, the action limits for each parameter were set.Results The mean value of SNR for the three devices was 262.14, 280.47 and 474.24, and SD was 18.43, 29.67 and 29.95, respectively; the action limits were ≥ 225.28, ≥ 221.13 and ≥ 414.34, respectively; the mean value of PIU for the three devices was 95.00%, 83.17% and 84.33%, SD was 0.63%, 1.17% and 0.82%, respectively; the action limits were ≥ 93.74%, ≥ 82.00% (corrected) and ≥ 82.69%, respectively. The mean value of PSG for the three devices was 0.11%, 0.07% and 0.14%, SD was 0.12%, 0.03% and 0.11%, respectively; the action limits were ≤ 0.35%, ≤ 0.13% and ≤ 0.36%, respectively.Conclusion All of SNR, PIU and PSG for three MR devices were consistent with the action limits in this study. |
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