Your forehead movement should be assessed by a cosmetic dermatologist or plastic surgeon. It would be very simple to try a small amount of Botox to lower your right eyebrow.
Hi, a dermal filler should be fine but I would avoid having Radiesse (calcium based dermal filler)in the face if you are going to have a head or face CT. Radiesse will setup a signal, wherever injected, on the CT scan. Hope this helps.