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Fig 1. Transverse T2-weighted TSE, FLAIR, and DIR image examples documenting the higher sensitivity of DIR in the detection of inflammatory brain lesion in the infratentorial brain.
Top row (A–C), A 36-year-old woman presenting with a polysymptomatic CIS. A sharp delineated inflammatory lesion in the left pedunculus cerebelli (arrow) can be clearly identified on the DIR image but not on the corresponding sections of the T2 TSE and FLAIR sequences.
Bottom row (D–F), A 23-year-old man presenting with optic neuritis of the left eye. Compared with the T2 TSE and FLAIR images, more lesions in both hemispheres of the cerebellum (arrows) can be identified on the DIR image. Moreover, those lesions identified on all 3 sequences were better delineated on DIR compared with the corresponding T2 TSE and FLAIR images.
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