Patent Document ID: 20030164701
Application ID: 10342006
Patent Status: 0

Claim One:
1. In a method for magnetic resonance imaging using partial parallel acquisition for projection reconstruction, including exciting nuclear spins in a subject and acquiring radiofrequency signals arising from the excited nuclear spins in a plurality of projection datasets, with a plurality of reception coils having respective sensitivity profiles, under a readout gradient and entering said projection datasets into k-space, the improvement comprising: under-scanning k-space with said coils and forming a complete projection dataset by progressively rotating said readout gradient through successive fixed step angles; producing a Cartesian resultant dataset by transforming said projection dataset in k-space onto grid points of a first Cartesian grid with a first grid constant; producing a Cartesian reference dataset by transforming a central region of the projection dataset in k-space onto a second Cartesian grid having a second grid constant that is smaller than said first grid constant; calculating the respective sensitivity profiles of said coils from said reference dataset; and reconstructing a resultant image of said subject by linking the respective sensitivity profiles of said coils, calculated from said reference dataset, with said resultant dataset.