@mjp0512 I have only recently heard of them. I gather that some of the more affluent individuals have one done every year . But my sister mentioned it to me, yesterday. My husband and I are going to Lithuania in September and she said those type of scans (MRI, I understand) might be considerably cheaper in Lithuania. She wondered if I had considered getting one or having my husband get one. So, I am just in the curious stage, right now.