Patent ID: 8571631

Claim:
A method for contrast agent-free, non-triggered angiographic imaging in magnetic resonance tomography, comprising the steps of: (S 1 ) operating a magnetic resonance tomography apparatus to acquire a dataset, selected from the group consisting of a two-dimensional (2D) dataset and a three-dimensional (3D) dataset, of magnetic resonance data from a body region of an examination subject having blood flowing therein, using a flow-insensitive steady state free precession (SSFP) magnetic resonance data acquisition sequence selected from the group consisting of trueFISP (wherein FISP is a fast imaging with steady state precession sequence), and phase-cycled SSFP sequences; (S 2 ) acquiring a dataset, selected from the group consisting of a 2D dataset and a 3D dataset, of magnetic resonance data from said body region using a FISP sequence as a flow-sensitive SSFP sequence; (S 3 ) bringing said dataset acquired in (S 1 ) into registration with the dataset acquired in (S 2 ), thereby obtaining a registered dataset from (S 1 ) and a registered dataset from (S 2 ); (S 4 ) subtracting said registered dataset from (S 2 ) from the registered dataset from (S 1 ) by unweighted or self-weighted subtraction; (S 5 ) subjecting a dataset resulting from the subtraction in (S 4 ) to image correction by removing image distortions caused by gradient field inhomogeneities or basic magnetic field inhomogeneities, to obtain a corrected dataset; and (S 6 ) generating an angiographic image from the corrected dataset from (S 5 ) in a representation selected from the group consisting of a maximum intensity projection (MIP) and a segmented vessel tree.