In-Plane Bulk Motion Correction in 2D Radial Fast Spin Echo MRI
Newbould R, Trouard T, Gmitro A, Ramanna S, Sarlls J
An algorithm for correcting motion artifacts in radial-FSE MRI is presented. The technique makes use of the inherent consistency properties of the moments of projections in radial datasets that have previously been implemented in radial-SE. In radial-FSE, however, each radial line (view) acquired within an echo train has a different T2 weighting, and consistency properties cannot be directly applied. With specific view acquisition ordering and data normalization, consistency properties are used to correct translational and rotational motion in radial-FSE. The method is evaluated in simulated data and in experimental data obtained from volunteers moving during MRI exams.