 and the amount of pain and discomfort that people experience. So I think one of the problems with imaging is to convince people that they're up the river without a paddle, that they have a lot of spurring, that they have, you know, this compression, that they have all kinds of anomalies that convince them that the pain they experience is structural and the only way to fix it is with some radical back surgery. And in some cases that is true, is if you have really bad arthritis of the spine, you know, you're going to be in pain.