Patent ID: 8542012

Claim:
A method, comprising: controlling a parallel magnetic resonance imaging (pMRI) apparatus to acquire, from an object to be imaged, throughout a period of time, two or more non-Cartesian calibration data sets, where the two or more non-Cartesian calibration data sets are acquired at different points in time; controlling the pMRI apparatus to acquire an under-sampled non-Cartesian data set from the object to be imaged; controlling the pMRI apparatus to perform a through-time non-Cartesian GRAPPA calibration comprising computing at least one GRAPPA weight set from data in the two or more non-Cartesian calibration data sets; and controlling the pMRI apparatus to reconstruct an image of the object to be imaged from the under-sampled non-Cartesian data set where a value for a point missing from k-space in the under-sampled non-Cartesian data set is computed using the GRAPPA weight set as calibrated and applied for the missing point.