Radiologist/Nuclear Medicine here:

This is interesting because it’s another application of Cu64 for PET imaging as opposed to more widely available tracers such as F18 or Ga68. Cu64 has some advantages because it has a comparable positron energy to F18 which leads to good image resolution but a substantially longer half life at 12 hours, which makes logistics of dose delivery and radiopharmaceutical preparation much easier than the 110 minute half life of F18.

Cu64 has recently been approved as the radionuclide pair for neuroendocrine tumor imaging in Cu64-Dotatate so hopefully we see more agents coming online.