Fig. 1

Representative example of a 59-year-old female with type A thyoma. a Axial T2-weighted black-blood imaging. b Axial post-gadolinium T1-weighted images (T1WI). c, e Axial native T1 mapping imaging. d, f Axial post-contrast T1 mapping imaging. The freehand region of interest (ROIs) were manually drawn on both native T1 and post-contrast T1 mapping imaging (c, d) where the largest area of the tumor on axial MR images was included. The ROI was smaller in size than the mass and included only the enhancing part of the tumor avoiding cystic or necrosis part. T1 values of the blood pool were obtained from the descending thoracic aorta at right pulmonary artery level on both native T1 and post-contrast T1 mapping imaging (e, f)