Ablation question regarding radiation please help>>>>>>>>>>

Hello, I'm a healthy guy we talked before. I'm on a high antioxidant,organic vege,fruit,nut,and grass fed dairy. I just had radio frequency catheter ablation for svt which is rapid heart beat. This exposes me to some radiation I think around 15 msv.... I researched and it says it increases my chance of fatal cancer by 0.33 percent which is lifetime risk of 294 out of one million persons. I took organic chlorella before procedure and since ablation I have been eating tons of chlorella,spiulina,kelp,and organic nori sheets. Will this truly help get this radiation out of my body ? Also do you think the people who did get fatal cancer out of that million had pre existing conditions maybe? And also who knows if these took all these greens...you think I'll be ok? I heard the 3D mapping can reduce radiation and it depends on the time of the procedure.. my was around an hour and a half....my Dr was Dr.Mohammed Khan he studied at Cleveland Clinic.