Hi and welcome,
Your question has landed in the MS community, due to your age of 74, i think it's unlikely your brain MRI was run because your neuro suspected your symptoms could be caused by a neurological condition like MS, more likely your neuro was looking for evidence of some of the more common age related neurological explanations.
There isn't enough information given to even guess if your results are abnormal for your age and medical history, white matter changes are not unexpected, T2-hyperintense foci are one of the most frequent MRI findings and the more prolific it is the more likely the brain will shrink (atrophy) 'but' please keep in mind that some level of atrophy is within normal levels depending on your age and medical history...
"Normal aging causes atrophy of the brain. The aging brain shrinks by an average of 1.9 percent every 10 years. It begins in young adulthood, but becomes more prominent when individuals reach their sixties. People can reportedly lose a half percent to 1 percent of brain volume per year after the age of 60. This is due to the number of cells in the brain decreasing with age, thus resulting in generalized atrophy. Some areas of the brain may shrink more than others, like the hippocampus, which is involved in memory. " http://www.livestrong.com/article/161959-what-are-the-causes-of-brain-atrophy/
Unfortunately all i can really tell you is that moderate global atrophy 'may be' related to what's happening to you but you really need to discuss what this all means with your doctor.
Hope it helps........JJ