Extending HARP Imaging by Acquiring an Overdetermined Set of Stripes

Lucilio Cordero-Grande¹, Carlos Alberola-Lpez¹

An extension of HARP reconstruction in tagged MR imaging is presented in which a number of stripe patterns greater than the dimension of the space are acquired in order to robustify the reconstruction of the local phase of the image. Reconstruction equations for the estimation of the deformation gradient tensor are presented and combined with a previous contribution which improves the original HARP method by using the windowed Fourier transform to better capture the spatio-spectral distribution of the magnetization pattern. Results on real images deformed by a synthetic pattern show the benefits of the proposed scheme in limiting the interferences in HARP reconstruction.