Combining PROPELLOR motion correction with arbitrary trajectories in peripheral k-space
Publication Date: 2015-Mar-06
The IP.com Prior Art Database
Title: Combining PROPELLOR motion correction with arbitrary trajectories in peripheral k-space.
The approach pertains to an magnetic resonance imaging method which involves a Propeller-type acquisition technique.
According to the approach the magnetic resonance imaging method involves a Propeller-type acquisition technique in which Cartesian sampling trajectories are applied in successive ‘blades’ in k-space. These blades are angularly offset from each other and have different rotational orientations with respect to the centre of k-space. The peripheral regions of k-space are scanned along trajectories that are curved outwards, e.g. as spiral arms. The curved trajectory-section extend continuously (or even continuously differentiable) from the corresponding Cartesian trajectory section for the centre region.
The approach enables parallel imaging techniques to be applied in an easy manner in the centre region of k-space where Cartesian trajectories (straight lines) are used. The redundancy in the scanning of k-space is a good basis for determination of motion correction. The periphery of k-space is scanned in a ‘spiral’ approach that is efficient in that more data are acquired per time span scanning time.
The PROPELLOR (or Multi-Vane) product of Philips has to potential of being a more robust imaging technique than regular Cartesian sampling. The motion correction method, enabled by the blade overlapping in central k-space, is...