%0 Journal Article
%T Analysis of the time-velocity curve in phase-contrast magnetic resonance imaging: a phantom study
%A Eun-Ju Kang
%A Hui Joong Lee
%A Jieun Park
%A Jongmin Lee
%A Junghun Kim
%A Ki-Nam Lee
%A Sinjae Hyun
%A Sung Won Youn
%A Vojt¨§ch Such¨¢nek
%A Yongmin Chang
%J Computer Assisted Surgery
%D 2019
%R https://doi.org/10.1080/24699322.2019.1649066
%X Abstract 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
%U https://www.tandfonline.com/doi/full/10.1080/24699322.2019.1649066