Fast Image Reconstruction in the Presence of Dynamic Higher-Order Fields

Bertram Jakob Wilm¹, Christoph Barmet¹, Klaas Paul Pruessmann¹

MRI in the presence of higher-order fields poses a complex reconstruction problem. An accelerated algebraic reconstruction approach is proposed by expanding the higher-order field terms into a weighted sum of optimized basis functions. Thereby image reconstruction can be performed by utilizing the computational efficiency of Fast Fourier Transforms. Acceleration by orders of magnitude is achieved with a minimal loss in computational accuracy.