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4D MR Imaging - Self-navigated 4D Cartesian Imaging of Periodic Motion

Acquistion and reconstruction method for MR motion imaging and correction

Acquisition

A Cartesian 3D random Gaussian ESPReSSo subsampling is proposed which acquires a random combination of k-space lines ky and kz in each repetition, as illustrated in the Figure below. Periodically the central k-space lines are acquired which serve as a self-navigation signal in the reconstruction.

• precompiled 4D MR imaging sequence: CS_Retro (Siemens, VB20P)

Reconstruction

retrospective motion gating and reconstruction of subsampled data

• self-navigation signal extraction
• gating procedure
• for the CS reconstruction, please refer to https://github.com/thomaskuestner/CS_LAB

Matlab

code included here

Gadgetron

please refer to https://github.com/thomaskuestner/CS_LAB/reconstruction/gadgetron/CS_LAB_Gadget

Please read LICENSE file for licensing details.

Detailed information are available at: https://sites.google.com/site/kspaceastronauts/motion-correction/4d-mr-imaging