A [68]Ga-HA-DOTATATE PET/CT scan is a nuclear medicine test used to create pictures of the whole body that will show where somatostatin receptors are found, including on tumours. Somatostatin receptors are found on most neuroendocrine tumours (NETs), and some other types of tumours. Currently at the Cross Cancer Institute, most patients with suspected somatostatin positive tumours (e.g. NETs) have an Octreoscan™. A scientific study has shown that a scan with a similar product ([68]Ga-DOTATATE) is more accurate than an Octreoscan™. This study will look at [68]Ga-HA-DOTATATE scans, a product virtually identical to [68]Ga-DOTATATE.