Fourier tracking of myocardial motion using cine-PC data.
Fourier tracking of myocardial motion using cine-PC data.
复制标题
使用电影 PC 数据对心肌运动进行傅里叶跟踪。
DOI：
10.1002/mrm.1910350405
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发表时间：
1996
影响因子：
3.3
通讯作者：
Pelc,NJ
中科院分区：
文献类型：
--
作者：
Zhu,Y;Drangova,M;Pelc,NJ
推导并分析了一种闭合积分方法，用于根据速度场数据计算运动轨迹，特别是通过相位对比（PC）电影MR成像测量的运动轨迹。通过将周期性运动建模为由傅立叶谐波组成并在频域中对跟踪点的材料速度进行积分，该方法在存在白色测量噪声和涡流效应的情况下给出了无偏的轨迹估计。当应用于电影PC数据时，该方法可以包括对电影插值的频率响应的补偿，从而进一步提高跟踪精度。在模拟和体模研究中，估计的轨迹与真实轨迹非常一致。志愿人员提供的数据也取得了令人鼓舞的结果。
A closed‐form integration method is derived and analyzed for computing motion trajectories from velocity field data, particularly as measured by phase contrast (PC) cine MR imaging. By modeling periodic motion as composed of Fourier harmonics and integrating the material velocity of the tracked point in the frequency domain, this method gives an unbiased trajectory estimate in the presence of white measurement noise and eddy current effects. When applied to cine PC data, the method can incorporate compensation for the frequency response of the cine interpolation, offering a further improvement on the tracking accuracy. In simulation and phantom studies, the estimated trajectories were in excellent agreement with the true trajectories. Encouraging results have also been obtained on data from volunteers.