I can truly sympathize with those who've been diagnosed with terminal conditions and have been told there's nothing medical science can do to help. I think I can also understand the will to fight back and find a cure. It's normal to want to get a second, or even third, opinion from a different medical provider.
But please, don't fall prey to unscrupulous charlatans and quacks looking to line their own pockets from your unfortunate circumstances. Stick with licensed, reputable medical providers whom use approved, scientific, evidence-based medicine. Remember - there are no such things as Z-rays.