lead poisioning

I found out that I had lead poisioning two years ago. I could not talk, couldnt remember words, very exhausted. Everything went very fast, conversations, TV, driving. I have had a year of weekly EDTA chelations and a year of nurishing IVs to put good minerals back and to help the adrenals as they failed along with thyroid, etc. I am now getting an MRI ordered by a neurologist as some of my symptoms are coming back again. I had two seizures. My insurance requires that I get a ct scan first.  My question:   Is there any problem with having lead in the brain tissue and getting a CT Scan? PS: I got the lead poisioning from purchasing an old 1943 home and remodelling it over 13 years myself.