My next scan to determine tumor size change will be done without gadolinium contrast agent. So, I've had two with gadolinium contrast agent, but from now on it will be without. I've requested T2 weighted images and hopefully the MRI place knows that fast spin echo (fse) or turbo spin echo (tse) is the best subtype under T2 weighted images.
My summary is to get your diagnostic MRI done with contrast agent (T1 weighted and T2 weighted), but switch to a T2 weighted image from then on. I'll let you know how successful this approach is once I've had my next (T2 weighted) MRI at the end of the month. Also the tumors growth profile.
By the way, don't get T1 weighted and T2 weighted confused (which define the MRI pulse sequence employed) with the power of the MRI machine T1.5, T3, etc (which is the magnetic power of the machine in Teslas). I just realized that this will probably confuse many.
Most people will use a 1.5 T machine. The image quality coming from a 3.0 T machine is much better. I can only imagine how wonderful a 7.0 image would look (and how expensive). I find 1.5T to give enough resolution to keep track of size.