– what type of contrast will they be using? Please find out.

 since Dotarem is a type of gadolinium based contrast agent, there is the risk of deposition in the body. The reasons for using this contrast really need to warrant the possible risks: https://pubmed.ncbi.nlm.nih.gov/28362042/

It is excreted through the kidneys so drinking a heavy intake of water (can add lemon as well) to flush it out is a good strategy. There isn’t much research on effective ways to chelate gadolinium, however it has been suggested to follow other heavy metal chelation protocols to help the body rid itself of this toxin.
 
Heavy metals are usually processed by the liver using glutathione conjugation (as is the case for mercury (Hg), lead (Pb), and some other heavy metals). We need to be able to methylate well to make glutathione. And we need available amino acids and extra B6 for the phase 2 liver detox.

Therefore supporting liver detox and supporting chelation as much as possible post-procedure might help. High intake of raw cilantro 2-3x/day (consider juicing) as well as a B-complex and ideally modified citrus pectin for the next 3-4 weeks (ex. EcoNugenics PectaClear 6 capsules before bed on an empty stomach with nothing else at all but water). No alcohol, caffeine/tea or smoking. Really support the liver, and keep the kidneys happy.

 try this smoothie combo: kale, cilantro, celery, broccoli, blueberries, apple, flaxseed, organic bone broth and vanilla almond milk

 yes those can be helpful as well