B0 field distortions monitoring and correction for 3D non-Cartesian fMRI acquisitions using a field camera: Application to 3D-SPARKLING at 7T
Résumé
The benefit of retrospective correction of static and dynamic field imperfections was studied on non-Cartesian compressed sensing-based
acquisition patterns by taking as an example 3D-SPARKLING encoding scheme. Long-TR dynamic acquisitions of T2*-weighted MRI (fMRI-like)
volumes were acquired at 7T, retrospectively corrected, and the evaluation of the corrections was based on the image quality and the gain in
temporal signal-to-noise ratio (tSNR). We found that correcting for the static and dynamic order contributions is enough to enhance the image
quality and tSNR significantly (up to 22% gain in median tSNR)
Domaines
Sciences de l'ingénieur [physics]
Origine : Fichiers produits par l'(les) auteur(s)