I had the discussion with my Neurosurgeon a few years ago when the below advice came out from the TGA (Therapeutic Goods Administration) Australia
. I had my initial few MRI scans with GAD (Gadolinium dye). Basically I asked him if the GAD dye was still required each time I went for a follow up MRI (at one stage they were 3 months apart) - he said that the dye was not required ongoing. So each year when I get my MRI its without GAD.
This is from the TGA website 2017 :
"You are advised to limit gadolinium-based contrast agent use to circumstances where the extra information provided by the contrast agent is necessary, and in those circumstances to use the lowest effective dose and carefully consider the choice of agent. The TGA also recommends that you avoid repetitive scans using these contrast agents unless deemed clinically necessary. "
"Published studies have found that linear
gadolinium-based contrast agents appear to result in greater gadolinium retention in the brain than macrocyclic
this is the link to the above info and also has the table of Macrolytic and Linear Gadolinium Dye products and the manufacturers....https://www.tga.gov.au/alert/gadolinium-based-contrast-agents-mri-scans