Can I still have an MRI if I have microbead hair extensions?

I have MS and need my annual MRI. I wasn't thinking and just paid a lot of money for hair extensions. The MRI receptionist gave me a curt, well they need to come out. I would like a further investigation to see if they really need to come out as I would be losing lots of money/time. I just can't take them out and put them back on that easily. I found out that they are made from soft alloy (according to the hair stylist...I don't think she took chemistry so didn't get the actual names of what made up the alloy) and in looking into it, they are usually copper or aluminum. Does anyone have experience with MRIs and these types of hair extensions? Thanks in advance.