Multi-oriented windowed harmonic phase reconstruction for robust cardiac strain imaging

The purpose of this work is to develop a method for direct estimation of the cardiac strain tensor by extending the harmonic phase reconstruction on tagged magnetic resonance images to obtain more precise and robust measurements. The extension relies on the reconstruction of the local phase of the image by means of the windowed Fourier transform and the acquisition of an overdetermined set of stripe orientations in order to avoid the phase interferences from structures outside the myocardium and the instabilities arising from the application of a gradient operator. Results have shown that increasing the number of acquired orientations provides a significant improvement in the reproducibility of the strain measurements and that the acquisition of an extended set of orientations also improves the reproducibility when compared with acquiring repeated samples from a smaller set of orientations. Additionally, biases in local phase estimation when using the original harmonic phase formulat...

• Type: Journal
• Year: 2016
• Where: MIA
• Authors: Lucilio Cordero-Grande, Javier Royuela-del-Val, Santiago Sanz-Estébanez, Marcos Martín-Fernández, Carlos Alberola-López
• Keywords: Control Systems, MIA 2016