Investigating Respiratory Cycle-Dependent B0 in Liver MRI at 3T

Motivation: Respiratory motion disturbs the stability of the primary magnetic field (B0), leading to potential image artifacts. Despite the significant influence of respiratory motion on B0, understanding these variations in the liver remains understudied in quantitative MRI. Goal(s): To provide a comprehensive analysis of respiration-induced B0 variations in the liver. Approach: The study used direct simulations, acquisition simulations followed by reconstruction, and in vivo scans to quantify B0 variations in the liver. Results: Maximal temporal fieldmap variations were subject dependent and showed a mean variation in the order of 24.9 Hz across the respiratory cycle in the region close to the liver-diaphram interface. Impact: This research provides a clearer understanding of respiratory motion effects on MRI, particularly in the liver. These insights could lead to improved image clarity for quantitative imaging.