A<unk>  is a type of nuclear medicine test that uses either a<unk> -67 (67Ga) or<unk> -68 (68Ga) radiopharmaceutical to obtain images of a specific type of tissue, or disease state of tissue.<unk>  salts like<unk>  citrate and<unk>  nitrate may be used. The form of salt is not important, since it is the freely dissolved<unk>  ion Ga3+ which is active. Both 67Ga and 68Ga salts have similar uptake mechanisms.<unk>  also be used in other forms, for example 68Ga-PSMA is used for cancer imaging. The gamma emission of<unk> -67 is imaged by a gamma camera, while the positron emission of<unk> -68 is imaged by positron emission tomography (PET).<unk>  salts are taken up by tumors, inflammation, and both acute and chronic infection, allowing these pathological processes to be imaged.<unk>  is particularly useful in imaging osteomyelitis that involves the spine, and in imaging older and chronic infections that may be the cause of a fever of unknown origin.<unk> -68 DOTA<unk> s are increasingly replacing octreotide<unk> s (a type of indium-111<unk>  using octreotide as a somatostatin receptor ligand). The<unk> -68 is bound to an octreotide derivative chemical such as DOTATOC and the positrons it emits are imaged by PET-CT<unk> . Such<unk> s are useful in locating neuroendocrine tumors and pancreatic cancer.
Gallium scan
Whole body imaging
Xenon gas MRI
Photon-counting computed tomography
Single-photon emission computed tomography
Neutron imaging
GI cocktail
Neutron stimulated emission computed tomography