"to the short-chain peptide Tyr3-octreotate (TATE)"
"Gallium-68 DOTATATE (or Ga-68 DOTATATE) is a PET radiotracer that is a form of somatostatin-receptor (SSTR) functional imaging. It is most commonly used for evaluating primary and metastatic well-differentiated neuroendocrine tumours. There are also emerging uses for evaluating other somatostatin-expressing conditions, such as meningiomas or sarcoidosis 5."
"There are other forms 3-5:"
"linked, via a chemical macrocyclic chelator, known as DOTA (or tetraxetan; IUPAC name: 1,4,7,10-tetraazacyclododecane-tetraacetic acid)"