I Had A Cat Scan Of My Back And It

I had a cat scan of my back and it showed I had a lot of calcifications in my Aorta and was told to see my Cardiologist. Can a pet scan give a better look at these calcifications? I can not have a MRI because I have a pace maker. I am a female age 65 and had a heart attack 5 months after I had a normal heart cath done.