Patent ID: 7457655

Claim:
A method for producing an image of an object with a magnetic resonance imaging (MRI) system, the steps comprising: a) acquiring a projection of NMR data by performing a pulse sequence with the MRI system which samples through the center of k-space at a selected view angle; b) repeating step a) a plurality of times at different view angles such that the difference in view angles of successive projection acquisitions is an angle spacing that achieves sufficient linear independence; c) performing a one-dimensional Fourier transformation of each projection to form a plurality of spatial projections; d) calculating the 0th moment of each spatial projection; e) calculating the first moment of each spatial projection; f) correcting spatial projections for in-plane translational motion of the object using the calculated 0th and first moment information; g) calculating the second moment of each translation-corrected spatial projection; h) determining a rotational motion time record based on the 2 nd moments of the translation-corrected spatial projections; and i) calculating the actual projection view angles, which are perturbed by the in-plane rotational motion, using the detected rotational motion time record; and j) reconstructing an image using the translational-corrected spatial projections with a reconstruction method which incorporates the detected rotational motion time record to reconstruct the spatial projections based on their actual projection view angle.