What tracers are used in PET/CT scans?

What tracers are used in PET CT scans? There are many tracers. There are also something called the theragnostics where you actually have tracers that also carry a treatment component. We are seeing that the FDG PET, the glucose PET, it's not the best PET for myeloma. There are better PETs for myeloma. We have seen methionine, which is really good, but it's really impractical because it's such a short half-life. You have another amino acid marker, which is practical and also better than FDG, fluciclovene. And you have the CE38 marked PET and others also. I think this is a field in real development.