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. 2022 Apr;43(4):611–619. doi: 10.3174/ajnr.A7472

FIG 1.

FIG 1.

ROI placement is demonstrated on an SyMRI-generated T2-weighted MR imaging contrast (A, B, E, F, I, J, M, N) (TR = 4500 ms; TE = 100 ms; axial plane) and a diffusion tensor map superimposed on a T2-weighted turbo spin-echo sequence–based image (C, D, G, H, K, L, O, P) (TR = 3000 ms; TE =140 ms; axial plane) of a female infant (GA at birth: 24 + 4 weeks+days; PMA at MR imaging: 39 + 2 weeks+days). For each investigated brain region, 2 separate ROIs were defined at different levels: right/left PLIC (ROI 1: level of the foramen of Monro [A and C]; ROI 2: level of the third ventricle [B and D]); midbrain (ROI 1: level of the superior colliculus/intercollicular area [E and G]; ROI 2: level of the inferior colliculus [F and H]); pontine tegmentum (ROI 1: level of the locus coeruleus [I and K]; ROI 2: level of the superior olive [J and L]); and medulla oblongata (ROI 1: level of the inferior olive [M and O]; ROI 2: level of the dorsal column nuclei [N and P]).