Nuclear medicine making a come back?

During my undergrad, when people talk about Medical Physics, they assume it's either external beam radiotherapy, or CT/MRI imaging. Sometimes Health Physics is included. Rarely was nuclear medicine mentioned. But apparently, with the introduction of PET/CT combined scanner, nuclear medicine as its own specialty is making a come back. The use of radioactive source and x-ray imaging requires a special type of Physicist, the Nuclear Medicine Physicist. Until now, the role and responsibility of Nuclear Medicine Physicist is not yet well defined, but we should see changes in this area soon. In external beam therapy, for example, various protocols have been established by either AAPM or ICRU to define the required treatment quality as it pertains to physics. We may expect to see similar things being introduced to Nuclear Medicine, specifically to PET/CT scanner.