Uterine artery pulsatility and resistivity indices in pregnancy: Comparison of MRI and Doppler US
Uterine artery pulsatility and resistivity indices in pregnancy: Comparison of MRI and Doppler US
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DOI：
10.1016/j.placenta.2016.04.002
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发表时间：
2016-07-01
期刊：
影响因子：
3.8
通讯作者：
Lomas, D. J.
中科院分区：
文献类型：
--
作者：
Hawkes, R. A.;Patterson, A. J.;Lomas, D. J.
目的：这项工作的目的是评估在胎儿 MRI 检查期间是否可以识别子宫动脉 (UtA) 并测量其血流剖面。与当天超声多普勒评估进行比较。方法：35 例正常、健康、妊娠 28-32 周的单胎妊娠接受常规多普勒检查，随后进行 MRI 检查。使用相差 MRI 测量左右 UtA 的电阻率指数 (RI) 和搏动指数 (PI)。 Bland Altman 统计数据用于比较 MRI 和超声结果。结果：分析了 69 个可比较的血管。由于人工制品或技术错误，六艘船被排除在外。 Bland-Altman 分析表明，超声指数具有可比性，尽管总体上低于 MRI 指数；右 UtA RI 偏差 -0.03（95% 一致性限 (LOA) -0.27 至 +0.20），左 UtA RI 偏差 -0.06（95% LOA -0.26 至 +0.14）；右 UtA PI 偏差 -0.06（95% LOA -0.50 至 +0.38），左 UtA PI 偏差 -0.11（95% LOA -0.54 至 +0.32）。 MRI 得出的 PI 和 RI 分析的评估者间一致性良好。结论：本研究表明，在大多数妊娠晚期妊娠中，可以识别子宫动脉，并使用 MRI 测量其血流剖面，并且得出的 PI 和 RI 值与多普勒超声值相当。 (C) 2016 Elsevier Ltd. 保留所有权利。
Objective: The aim of this work was to evaluate whether the uterine arteries (UtA) could be identified and their flow profiles measured during a fetal MRI examination. A comparison was performed against same day sonographic Doppler assessment.Methods: 35 normal, healthy, singleton pregnancies at 28-32 weeks gestation underwent routine Doppler examination, followed by MRI examination. The resistivity index (RI) and pulsatility index (PI) of the left and right UtA were measured using phase contrast MRI. Bland Altman statistics were used to compare MRI and ultrasound results.Results: Sixty-nine comparable vessels were analysed. Six vessels were excluded due to artefact or technical error. Bland-Altman analysis demonstrated the ultrasound indices were comparable, although systematically lower than the MRI indices; Right UtA RI bias -0.03 (95% limits of agreement (LOA) -0.27 to +0.20), and left UtA RI bias -0.06 (95% LOA -0.26 to +0.14); Right UtA PI bias -0.06 (95% LOA -0.50 to +0.38), Left UtA PI bias -0.11 (95% LOA -0.54 to +0.32). The inter-rater agreement for the MRI derived PI and RI analysis was good.Conclusion: This study demonstrates that in the majority of early third trimester pregnancies, the uterine arteries can be identified, and their flow profiles measured using MRI, and that the derived PI and RI values are comparable with Doppler ultrasound values. (C) 2016 Elsevier Ltd. All rights reserved.