4D Flow Vorticity Visualization Predicts Regions of Quantitative Flow Inconsistency for Optimal Blood Flow Measurement.
4D Flow Vorticity Visualization Predicts Regions of Quantitative Flow Inconsistency for Optimal Blood Flow Measurement.
复制标题
4D 血流涡度可视化可预测定量血流不一致区域，以实现最佳血流测量。
DOI：
10.1148/ryct.2020190054
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Hsiao,Albert
中科院分区：
文献类型：
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作者：
Contijoch,FranciscoJ;Horowitz,Michael;Masutani,Evan;Kligerman,Seth;Hsiao,Albert
目的评价自动涡度图四维（4D） 在这项回顾性研究中，35例连续接受MR检查的患者， 2017年12月至2018年10月在3.0 T下使用4D Flow MRI进行血管造影 使用基于λ2的 涡量显示和量化技术。患者 年龄为58.6 ± 14.4岁（标准差），12名女性，18名 升主动脉瘤（最大直径> 4.0 cm）10例， 有二叶主动脉瓣流量测量是在上升 主动脉（aAo）、降主动脉中段、主肺动脉和上级 腔静脉统计检验包括dt检验和F检验，I类错误阈值（α）为 .05.结果35例患者按视觉分类为：无（n= 9），轻度（n= 8），中度（n = 10）， （n= 11），或严重涡度 （n= 7）。在所有患者中，标准 aAo时心输出量的偏差为0.58 L/min ± 0.45， 显著（P< .001）高于 肺动脉（0.15 L/min ± 0.10）和降主动脉， 上级腔静脉（0.14 L/min ± 0.12）。的标准偏差 在aAo中观察到的心输出量显著大于 （P< .01）中度或重度 涡度（0.73 L/min ± 0.55）高于无或轻度 结论心输出量和血流量是MRI检查的重要指标， 结构性心脏病的评估。涡度可视化可以是 用于帮助指导流量量化的最佳位置。关键词：成人， 动脉瘤， 血液动力学/血流动力学， MR-Imaging© RSNA，2020另见Markl在本期的评论。
PurposeTo evaluate whether automated vorticity mapping four-dimensional (4D) flow MRI can identify regions of quantitative flow inconsistency.Materials and MethodsIn this retrospective study, 35 consecutive patients who underwent MR angiography with 4D flow MRI at 3.0 T from December 2017 to October 2018 were analyzed using aλ2-based technique for vorticity visualization and quantification. The patients were aged 58.6 years ± 14.4 (standard deviation), 12 were women, 18 had ascending aortic aneurysms (maximal diameter > 4.0 cm), and 10 had bicuspid aortic valves. Flow measurements were made in the ascending aorta (aAo), mid-descending aorta, main pulmonary artery, and superior vena cava. Statistical tests includedttests andFtests with a type I error threshold (α) of .05.ResultsThe 35 patients were visually classified as having no (n= 9), mild (n= 8), moderate (n= 11), or severe vorticity (n= 7). Across all patients, standard deviation of cardiac output in the aAo (0.58 L/min ± 0.45) was significantly (P< .001) higher than in the pulmonary arteries (0.15 L/min ± 0.10) and descending aorta and superior vena cava (0.14 L/min ± 0.12). The standard deviation of cardiac output observed in the aAo was significantly greater (P< .01) in patients with moderate or severe vorticity (0.73 L/min ± 0.55) than in those with none or mild vorticity (0.44 L/min ± 0.26).ConclusionCardiac output and blood flow are essential MRI measurements in the evaluation of structural heart disease. Vorticity visualization may be used to help guide optimal location for flow quantification.Keywords:Adults, Aneurysms, Hemodynamics/Flow Dynamics, MR-Imaging© RSNA, 2020See also the commentary by Markl in this issue.