3-D Multi-Coil Motion Correction for Spiral Projection Imaging

Introduction Patient motion is a significant problem for MR imaging. Spiral Projection Imaging (SPI) is a 3-D imaging sequence, which provides enough data to deduce all six degrees of freedom of bulk motion [1]. Motion correction has been successfully demonstrated for quadrature coil data (both real and synthetic), by comparing data from individual planes [2,3] (Fig. 1). The extension to multi-coil data is complicated by the introduction of receiver coil sensitivity and phase. This work presents an appropriate approximation by combining multi-coil data in order to facilitate motion correction.