The aim of this study was to analyze the characteristics of time-velocity curve acquired by phase-contrast magnetic resonance imaging (PC-MRI) using an in-vitro flow model as a reference for hemodynamic studies. The time- velocity curves of the PC-MRI were compared with Doppler ultrasonography (US) and also compared with those obtained in the electromagnetic flowmeter. The correlation between techniques was analyzed using an electromagnetic flowmeter as a reference standard; the maximum, minimum, and average velocities, full-width at half-maximum (FWHM), and ascending gradient (AG) were measured from time-velocity curves. The correlations between an electromagnetic flowmeter and the respective measurement technique for the PC-MRI and Doppler US were found to be high (mean R² > 0.9, p < 0.05). These results indicate that these measurement techniques are useful for measuring blood flow information and reflect actual flow. The PC-MRI was the best fit for the minimum velocity and FWHM, and the maximum velocity and AG were the best fit for Doppler US. The PC-MRI showed lower maximum velocity value and higher minimum velocity value than Doppler US. Therefore, PC-MRI demonstrates more obtuse time-velocity curve than Doppler US. In addition, the time- velocity curve of PC-MRI could be calibrated by introducing formulae that can convert each measurement value to a reference standard value within a 10% error. The PC-MRI can be used to estimate the Doppler US using this formula.

这项研究的目的是分析使用体外血流模型作为血液动力学研究的参考，通过相衬磁共振成像（PC-MRI）获得的时间-速度曲线的特征。将PC-MRI的时速曲线与多普勒超声（US）进行了比较，并且还与在电磁流量计中获得的曲线进行了比较。使用电磁流量计作为参考标准分析了技术之间的相关性；根据时间-速度曲线测量最大，最小和平均速度，半最大全宽（FWHM）和上升梯度（AG）。发现电磁流量计与PC-MRI和多普勒超声的相应测量技术之间的相关性很高（平均值R ²  > 0.9，p <0.05）。这些结果表明，这些测量技术可用于测量血流信息并反映实际流量。PC-MRI最适合最小速度和FWHM，最大速度和AG最适合多普勒超声。PC-MRI显示出比多普勒超声仪更低的最大速度值和更高的最小速度值。因此，与多普勒超声检查相比，PC-MRI显示出更钝的时间-速度曲线。此外，可以通过引入公式将PC-MRI的时速曲线校准，该公式可以将每个测量值转换为参考标准值，且误差在10％以内。使用该公式，可以使用PC-MRI估算多普勒超声。