FLAIR is "Fluid attenuation recovery" method. Its to do with the MRI machine, not your actual brain.
Basically, no new lesions is good news, whatever type of MS you have. With relapsing remitting, things are always waxing and waning, with secondary progressive, they just get worse, either new ones develop or existing ones get bigger. With primary progressive, which Phil has, things can happen much slower, but again things don't go away, but you can obviously also develop new ones.
People can have lesions in a part of the brain which does not affect them on the outside, so a lot of waxing and waning can be going on without the person's knowledge, which is where the idea that an MRI is not a useful guide as to your real condition comes from. My last MRI still, to my mind, looked horrendous, but it was a lot less intense and there was nothing new. I feel a lot better than it looks and I am still slowly improving.
Leaving your MRI to one side, how are you? That is what really matters at the end of the day.
An Itinerary in Light and Shadow Completed Dr Charles Stratton / Dr David Wheldon abx regime for aggressive secondary progressive MS in June 2007, after four years. Still improving with no relapses since starting. Can't run but can paint all day.