RT info:eu-repo/semantics/article
T1 Multi-Oriented Windowed Harmonic Phase Reconstruction for Robust Cardiac Strain Imaging
A1 Cordero Grande, Lucilio
A1 Royuela del Val, Javier
A1 Sanz Estébanez, Santiago Rodrigo
A1 Martín Fernández, Marcos Antonio
A1 Alberola López, Carlos
K1 Tagged Magnetic Resonance Imaging
K1 Harmonic Phase Reconstruction
K1 Artifacts
K1 Strain Tensor
K1 Windowed Fourier Transform
AB The purpose of this work is to develop a method for direct estimation ofthe cardiac strain tensor by extending the harmonic phase reconstruction ontagged magnetic resonance images to obtain more precise and robust measurements.The extension relies on the reconstruction of the local phase ofthe image by means of the windowed Fourier transform and the acquisition ofan overdetermined set of stripe orientations in order to avoid the phase interferencesfrom structures outside the myocardium and the instabilities arisingfrom the application of a gradient operator. Results have shown that increasingthe number of acquired orientations provides a signi cant improvementin the reproducibility of the strain measurements and that the acquisition ofan extended set of orientations also improves the reproducibility when comparedwith acquiring repeated samples from a smaller set of orientations.Additionally, biases in local phase estimation when using the original harmonicphase formulation are greatly diminished by the one here proposed.The ideas here presented allow the design of new methods for motion sensitivemagnetic resonance imaging, which could simultaneously improve theresolution, robustness and accuracy of motion estimates.
YR 2015
FD 2015
LK http://uvadoc.uva.es/handle/10324/15156
UL http://uvadoc.uva.es/handle/10324/15156
LA spa
NO Medical Image Analysis (en prensa)
DS UVaDOC
RD 19-abr-2024