A New Methodology for Multiscale Myocardial Deformation and Strain Analysis Based on Tagging MRI
Myocardial deformation and strain can be investigated using suitably encoded cine MRI that admits disambiguation of material motion. Practical limitations currently restrict the analysis to in-plane motion in cross-sections of the heart (2D + time), but the proposed method readily generalizes to 3D...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2010-01-01
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| Series: | International Journal of Biomedical Imaging |
| Online Access: | http://dx.doi.org/10.1155/2010/341242 |
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| Summary: | Myocardial deformation and strain can be investigated using suitably encoded
cine MRI that admits disambiguation of material motion. Practical limitations
currently restrict the analysis to in-plane motion in cross-sections of the heart
(2D + time), but the proposed method readily generalizes to 3D + time. We propose
a new, promising methodology, which departs from a multiscale algorithm that
exploits local scale selection so as to obtain a robust estimate for the velocity
gradient tensor field. Time evolution of the deformation tensor is governed by a
first-order ordinary differential equation, which is completely determined by this
velocity gradient tensor field. We solve this matrix-ODE analytically and present
results obtained from healthy volunteers as well as from patient data. The proposed
method requires only off-the-shelf algorithms and is readily applicable to planar or
volumetric tagging MRI sampled on arbitrary coordinate grids. |
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| ISSN: | 1687-4188 1687-4196 |