Improved reconstruction of nonlinear spatial encoding techniques with explicit intra-voxel dephasing

Spatial encoding magnetic fields (SEMs) that vary nonlinearly over the field-of-view offer potential advantages for image encoding. This work investigates intra-voxel dephasing in the imaging plane when nonlinear SEMs are used. Intra-voxel dephasing reduces the signal from a voxel for strong encoding moments depending on the location of the pixel and the nonlinear fields used. A new signal model explicitly accounting for intra-voxel dephasing is derived to accurately explain experimental data acquired with nonlinear SEMs. Images reconstructed using the new signal model exhibit substantially less noise and fewer artifacts compared to the traditional signal encoding model.

How to access this content:

For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.

After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.

After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.

Click here for more information on becoming a member.