Routine MRI for MS

I recently had my annual MRI for MS. This MRI pictures are labelled differently to the ones I've had before. I usually have T2 Flair written on some images but this MRI is mostly T2 Space Dark Fluid Sag which I've never had on previous MRI's. What do the differences in image labels mean?

submitted by /u/bored-inthehouse
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source https://www.reddit.com/r/Radiology/comments/13h8kmw/routine_mri_for_ms/