使用电影谐波相位（HARP）磁共振成像进行心脏运动跟踪。
Cardiac motion tracking using CINE harmonic phase (HARP) magnetic resonance imaging.
作者信息
Osman N F, Kerwin W S, McVeigh E R, Prince J L
机构信息
Department of Electrical and Computer Engineering, Center for Imaging Science, The Johns Hopkins University, Baltimore, MD 21218, USA.
出版信息
Magn Reson Med. 1999 Dec;42(6):1048-60. doi: 10.1002/(sici)1522-2594(199912)42:6<1048::aid-mrm9>3.0.co;2-m.
This article introduces a new image processing technique for rapid analysis of tagged cardiac magnetic resonance image sequences. The method uses isolated spectral peaks in SPAMM-tagged magnetic resonance images, which contain information about cardiac motion. The inverse Fourier transform of a spectral peak is a complex image whose calculated angle is called a harmonic phase (HARP) image. It is shown how two HARP image sequences can be used to automatically and accurately track material points through time. A rapid, semiautomated procedure to calculate circumferential and radial Lagrangian strain from tracked points is described. This new computational approach permits rapid analysis and visualization of myocardial strain within 5-10 min after the scan is complete. Its performance is demonstrated on MR image sequences reflecting both normal and abnormal cardiac motion. Results from the new method are shown to compare very well with a previously validated tracking algorithm. Magn Reson Med 42:1048-1060, 1999.
本文介绍了一种用于快速分析标记心脏磁共振图像序列的新图像处理技术。该方法利用SPAMM标记磁共振图像中的孤立光谱峰值，这些峰值包含有关心脏运动的信息。光谱峰值的逆傅里叶变换是一个复图像，其计算角度称为谐波相位（HARP）图像。展示了如何使用两个HARP图像序列随时间自动且准确地跟踪物质点。描述了一种从跟踪点计算圆周和径向拉格朗日应变的快速半自动程序。这种新的计算方法允许在扫描完成后5 - 10分钟内快速分析和可视化心肌应变。其性能在反映正常和异常心脏运动的磁共振图像序列上得到了证明。新方法的结果与先前验证的跟踪算法相比非常好。《磁共振医学》42:1048 - 1060，1999年。
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