I think that may be the question you have to decide. I'm somewhat biased towards PET—I might as well just tell you that—so I think the answer is I that see it as where the field is going. It's a question of how big it becomes and whether it really replaces SPECT, because SPECT, as I said, can be in every hospital. It's in every operating room. It's very prevalent. So the question is, what will be the demand for it?
My suspicion is that it is not a growing demand, that at best it's a flat demand. Then the question will be whether it rolls off. I just don't know enough to be able to answer that question.