Four-Dimensional LV Tissue Tracking from Tagged MRI with a 4D B-Spline Model
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چکیده
Accurate delineation of the volumetric motion of left ventri-cle (LV) of the heart over time from tagged MRI is an important area of research. We have built a system that takes tagged short-axis (SA) and long-axis (LA) image sequences as input, ts a 4D B-spline model to the LV of the heart by simultaneously tting knot solids to the SA and LA frame sequences via matching 3 sequences of model knot planes to LV tag planes for 4D tracking. The advantage of the 4D model is that 3D material point localization and displacement reconstruction is achieved in a single step. The generated 3D displacement elds are validated with a cardiac motion simulator, and 3D motion elds capturing in-vivo deformations in a parcine model of a LV with postero-lateral myocardial infarction are illustrated.
منابع مشابه
Use of a 4D planispheric transformation for the tracking and the analysis of LV motion with tagged MR images
A major issue in cardiac imaging is the assessment of cardiac function and particularly the identi cation of ischemic or infarcted tissues. We present in this article a method to reconstruct the displacement eld of the left ventricular (LV) motion using 4D planispheric transformations of time and space combined in a rst step with B-spline tensor products. Because of the 4D modeling, a) it is po...
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تاریخ انتشار 1999