Keywords: Artifacts, Artifacts, Quantitative Imaging, Relaxometry
Motivation: Accurate estimation of R2 and R2' provides insights into physiologic and functional states of tissues.
Goal(s): To investigate the feasibility of self-correction of B0 field drift and radial trajectory errors in the nonbalanced SSFP-based R2 and R2’ mapping technique.
Approach: The inherent phase characteristics of the alternating nonbalanced SSFP are utilized, enabling self-correction of B0 field drift and k-space trajectory errors.
Results: In both phantom and brain scans, accuracy of parametric maps were enhanced with the self-correction of the two types of image artifacts.
Impact: The proposed method, which mitigates artifacts from B0 drift and trajectory mismatch in a self-correction manner, may prove to be a useful means in a wide range of neuroimaging studies seeking rapid and accurate quantifications of R2 and R2’.
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