Hi, Soundy:
For whatever it may be worth: my neurosurgeon ordered an MRI immediately following my surgery to determine how much of the tumor he had actually removed (about 40%). I had another MRI prior to planned FSR treatments, three months later, to help the surgeon and the radiation oncologist he worked with 'map' the tumor for FSR, then another MRI immediately following completion of the FSR treatments. I had a 'new' MRI in April as a 'baseline' and another in June, because the April scan appeared to show growth, although it was simply tumor swelling due to the radiation - and perfectly normal, just as I had suspected. My neurosurgeon is very conservative and just wanted to be absolutely certain. Some doctors are like that. Another MRI, in late June, confirmed that the tumor had actually shrunk and showed clear signs of necrosis. This was great news. In all, I underwent a total of 5 MRI scans, post-op.
My point is that doctors, like patients, are individuals, with their own way of doing things. While your doctor may want to view a 'new' MRI just to see how much of the tumor he removed, he may have some other motive, but not necessarily one that involves a problem, especially if you're not reporting any symptoms. I seriously doubt your doctor is withholding any vital, negative information from you.
I trust that this has been resolved, by now.
Jim