Hi and welcome,
Breath - you need to read the totality of your MRI and not just the bit that mentions something, which without more information could be something as common as the tiny micro vascular related.
IF your MRI report doesn't mention anything else these findings are likely nothing for you to be worrying about, so try not to focus on it being something when it honestly might be nothing.
Hope that helps......JJ
ps why did you get an MRI?