Abstract
Accurate delineation of the volumetric motion of the left ventricle (LV) of the heart from tagged magnetic resonance imaging (MRI) is an important area of research. We have built a system that takes extracted tag line features from short axis (SA) and long axis (LA) image sequences as input and fits a fourdimensional (4-D) time-varying B-spline model to the data by simultaneously fitting the model knot solids to MRI frames via matching three sequences of solid knot planes to the LV tag planes for 4-D tracking. Important advantages of the model are that reconstruction of tag surfaces, three-dimensional (3-D) material point localization, as well as displacement reconstruction are all achieved in a single step. The generated 3-D displacement fields are validated with a cardiac motion simulator, and 3-D motion fields capturing in vivo deformations in a porcine model with posterolateral myocardial infarction are illustrated.
Original language | English |
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Pages (from-to) | 957-972 |
Number of pages | 16 |
Journal | IEEE Transactions on Medical Imaging |
Volume | 18 |
Issue number | 10 |
DOIs | |
State | Published - 1999 |
Keywords
- B-spline deformable model
- Cardiac motion
- Myocardial infarction
- Tagged mri