stage 4, a port and m r i

my daughter has her 2 breast to liver stage 4. she has a port for delivery of meds. i want her to have m r i for brain. she says is not an option with the port. what do you do for brain check if you have a port? she had allergic reaction to carboplatin after 3 months and is now on herceptin and taxol. 3 weeks on and one off. appreciate any news. her hair is starting to grow back anyone experience hair return while on chemo. thanks, gail