An improved reconstruction pipeline for arterial spin labeling (ASL) by means of a 3D GRASE PROPELLER (3DGP) acquisition is presented. Quality of ASL perfusion images is affected by motion artefacts, which can be mitigated by self-referred motion correction with 3DGP. However, since 3DGP is based on an EPI readout, geometric distortion is introduced in images, especially for long echo train lengths (ETL). The proposed method allows self-referred correction of motion as well as geometric distortion by playing each PROPELLER brick twice with toggled phase-encoded direction. The Topup technique then enables distortion correction followed by PROPELLER motion correction.
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.
Keywords