Systems and methods for B₀-corrected arterial spin labeling magnetic resonance imaging

摘要

Disclosed herein are systems and methods for correction of imaging-plane uniform magnetic field—(B₀) inhomogeneity-induced magnetic resonance imaging (MRI) artifacts. The systems and methods can be implemented to improve the filtering and correction of arterial spin labeling (ASL) MRI data by forming a tagging dependent Z-spectrum (TADDZ) of ASL MRI data. In TADDZ, images are acquired via ASL, MRI after tagging blood water at a number of tagging, distances upstream and downstream of die MM system's imaging plane. A tagging distance dependent Z-spectrum is analyzed for each image to map the magnetic field inhomogeneity across the imaging plane. Along with magnetic-field mapping, Z-spectrum analysts and data processing enables TADDZ to remove magnetic field inhomogeneity induced artifacts, resulting in more clear and clinically relevant perfusion imaging via MRI.