Grandfather died from contrast dye at 53, plus i have many allergies, some deadly., does that put me at higher risk of reaction to ct or mri dye?

Family history = not: This is an area of controversy and ongoing research. The main risk factors for reaction are thought to be: prior adverse reaction to contrast agents, urticaria, an allergic history to drugs other than contrast agents, contrast agent concentration >70%, age <50 years, and total contrast agent dose >65 g. Contrast reaction is not like other 'allergic' reactions and family history is not a known risk

Plan: You must to inform doctors about these multiple allergies and history of your grandfather before any of invasive tests. But we have way to prevent anaphylactic reaction and save the patient. Be well. Best wishes.

Possibly: You should mention this to any physician who wants to order a contrast study