Iterative Motion Compensated Reconstruction

Tim Nielsen¹, Peter Boernert¹

Motion during data acquisition can seriously degrade image quality. Motion compensated reconstruction can restore image quality if the motion is measured with suitable navigator signals. We present a new scheme for motion compensated reconstruction which can be applied to segmented Cartesian acquisitions (e.g. TSE, TFE). It can be combined with parallel imaging and is fast because it works mainly in the spatial domain avoiding many Fourier-transforms between k-space and image space. The motion is detected and quantified by adding an orbital navigator echo in front of the imaging echoes.