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. 2020 Mar 6;15(5):534–541. doi: 10.1016/j.radcr.2020.02.002

Fig. 2.

Fig. 2

Unenhanced axial T1-weighted MR images (MRI) of the posterior fossa at the level of the dentate nucleus of our patient (first and second line) and same views taking advantage of contrast enhancement by ImageJ (third and fouth line): (a, A, I MRI) before any gadolinium administration (dentate nucleus-to-pons signal intensity ratio = 1.0259), (b, B, VI MRI) sixth exam (dentate nucleus-to-pons signal intensity ratio = 1,0739), (c, XIV MRI) fourteenth exam (dentate nucleus-to-pons signal intensity ratio = 1,1212), (d, XV MRI) fifteenth exam (dentate nucleus-to-pons signal intensity ratio = 1,1581). Else than stronger quantitavite analysis as reported, a qualitative difference can be appreciated among the first (a, A) and the last (d, D) image: a wide higher signal in the central and upper region of the cerebellum than in the pons and lower lateral cerebellar hemispheres can be observed, thus masking visually appreciable dentate nucleus hyperintensity, that is conversely revealed by quantitative analysis. Regions of interest (ROI) used for quantitative analysis on dentate nucleus and pons are shown. MRI, magnetic resonance imaging.