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. 2021 Jun;42(6):1073–1079. doi: 10.3174/ajnr.A7145

FIG 1.

FIG 1.

Flow diagram outlining the methodology for defining and validating the shrimp sign. In the preliminary stage, axial planes of T1-weighted imaging, T2-weighted imaging, FLAIR, and, when available, postgadolinium T1-weighted images were studied. In subsequent stages, these images were also examined in the sagittal and coronal planes.