Contrast enhanced MRA with retrospective selection of acceleration factor

A new 3D time resolved contrast enhanced MR angiography (CE-MRA) technique is presented that uses both parallel MRI (pMRI) and an object support constraint to enable high temporal and spatial resolution imaging. The k-space data acquisition is such that the acceleration factor can be chosen in post-processing, enabling a temporal window to be chosen to give an optimum, high SNR arterial view. This technique allows both temporal dynamic to be assessed while not compromising SNR for a single peak arterial phase image. An object support constraint is incorporated to improve the reconstruction SNR