Fig. 1

FGT and artefact measurements. The overall volume of FGT was manually assessed by both radiologists independently on T1-weighted images in three orthogonal planes. Dg₁ and Dg₂ were the maximal extension measured in the axial plane (a). Dg₃ was the maximal extension measured in the coronal plane (b). The artefact diameter assessed on both T1- and T2*-weighted images in three orthogonal planes are shown in c (Da₁, Da₂) and d (Da₃)