Application of Fourier-Based Phase Unwrapping Algorithm for MR-Venography
Bagher-Ebadian H, Ewing J, Jiang Q
Henry Ford Health System
This study presents an algorithm for unwrapping experimental MRI phase maps in the presence of noise. The algorithm employs Laplacian operators in the Fourier space of the phase map, accomplishing in a single-step deterministic procedure a fast and practical solution for phase unwrapping problems in MR-venography and other MRI applications. In enhancing the vein structures in generated venograms, the algorithm shows a superior performance for images with high phase gradients and noise. The method can also be used to produce maps of static magnetic field inhomogeneity, thus guiding shimming of the MR magnetic field.