| 陈弘,利灏天,谢涵,姚紫琦,陈煜豪,利晞.ROI面积对PC-MRI测量基底动脉血流动力学参数的影响[J].中国医学影像技术,2020,36(11):1714~1717 |
| ROI面积对PC-MRI测量基底动脉血流动力学参数的影响 |
| Impact of ROI size on hemodynamic parameters of basilar artery measured with PC-MRI |
| 投稿时间：2019-09-24 修订日期：2020-04-30 |
| DOI：10.13929/j.issn.1003-3289.2020.11.029 |
| 中文关键词: 基底动脉 血流动力学 磁共振成像 相位对比 感兴趣区 |
| 英文关键词:basilar artery hemodynamic magnetic resonance imaging phase-contrast region of interest |
| 基金项目:广东省中医药局科研项目（20182083）。 |
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| 中文摘要: |
| 目的 观察不同面积ROI对于相位对比MRI（PC-MRI）测量基底动脉（BA）血流动力学参数的影响。方法 采集48名健康志愿者BA中间段PC-MRI，勾画ROI，使之分别占血管截面面积的100%、80%、60%及40%，依次记为ROI1、ROI2、ROI3及ROI4。比较不同ROI所测血管平均流量（MF）、平均流速（MV）及收缩期最高流速与舒张期最低速度差值（ΔV）的差异。结果 ROI1与ROI3及ROI4间BA各参数（MF、MV、ΔV）差异均有统计学意义（ROI1 vs ROI3：H=56.74、－47.56、－34.49，ROI1 vs ROI4：H=101.47、－64.49、－47.08，P均<0.05），ROI2与ROI3及ROI4间MF差异均有统计学意义（H=32.24、76.97，P均<0.05），ROI3与ROI4间MF差异有统计学意义（H=44.73，P<0.01），ROI2与ROI4间MV差异有统计学意义（H=－37.67，P=0.01），其余各参数各ROI间差异均无统计学意义（P均＞0.05）。结论 采用PC-MRI测量健康成年人BA血流动力学参数时，ROI不应小于血管截面面积的80%，否则可低估MF而高估MV、ΔV。 |
| 英文摘要: |
| Objective To observe the impact of ROI size on hemodynamic parameters of basilar artery (BA) measured with phase contrast MRI (PC-MRI). Methods PC-MRI of the middle segment of BA were obtained in 48 healthy volunteers. ROIs were plotted with 100% (ROI1), 80% (ROI2), 60% (ROI3) and 40% (ROI4) of the cross-sectional area of BA, respectively. The mean flux (MF), mean velocity (MV), the peak systolic velocity and end diastolic velocity (ΔV) of BA were compared among different ROIs. Results There were statistical differences of MF, MV and ΔV of BA between ROI1 and ROI3 or ROI4 (ROI1 vs ROI3: H=56.74, －47.56, －34.49, ROI1 vs ROI4: H=101.47, －64.49, -47.08, all P<0.05). There were significant differences of MF between ROI2 and ROI3 or ROI4 (H=32.24, 76.97, both P<0.05), also of MF between ROI3 and ROI4 (H=44.73, P<0.01), of MV between ROI2 and ROI4 (H=－37.67, P=0.01). No significant difference of other parameters was found (all P>0.05). Conclusion Measuring hemodynamic parameters of BA of healthy adult, ROI should not be sketched less than 80% of the cross-sectional area of BA, otherwise MF might be underestimated, while MV and ΔV might be overestimated. |
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