文档介绍：A Multi-Scale Phase-Based Optical Flow Method for
Motion Tracking of Left Ventricle
Xiaomei Yang Kenya Murase
College of Electrical Engineering and Information Department of Medical Physics and Engineering, Division
Technology, Sichuan University, P. R. China. of Medical Technology and Science, Faculty of Health
e-mail:******@scu. Science, Osaka University, Japan.
e-mail: ******@ -
Abstract—Quantitative analysis of cardiac motion is important in physics [4]. However, acquiring a MR parameter of a heart is
assessing ventricular function. Multi-scale phase-based plex and HARP tracking methods rely
flow (OF) method for motion tracking of the left ventricle (LV) is on the fact that the phase is a property of tissue which remains
presented for tagged ic resonance (MR) image sequence. constant over the cardiac cycle [5]. Therefore, the motion
Two phase images, which contain the information about the tracking algorithm searches in a second image for the point
motion orthogonal to the tag lines, are derived from harmonic having the same phase values as that in the first image.
phase (HARP) technique for each frame. The two phase images
rather than brightness are used as sources in the OF method to Since the phase of a material point remains constant over
calculate displacement flow, since the phase is a p