gallium-68 DOTATATE PET
Advanced imaging technique using radiolabeled somatostatin analog to detect and stage somatostatin receptor-positive neuroendocrine tumors.
Full Definition
Gallium-68 DOTATATE PET (positron emission tomography) is a highly sensitive and specific nuclear medicine imaging technique for detecting neuroendocrine tumors that express somatostatin receptors. DOTATATE is a somatostatin analog labeled with the positron-emitting radionuclide gallium-68, which binds to somatostatin receptors (particularly subtype 2) on neuroendocrine tumor cells. This imaging modality has largely replaced octreotide scintigraphy due to its superior image quality, shorter acquisition time, and better spatial resolution. Gallium-68 DOTATATE PET is essential for initial staging, detecting occult disease, monitoring treatment response, and selecting patients for peptide receptor radionuclide therapy.
Usage
Usage note: Use hyphens in gallium-68; capitalize DOTATATE as it's an acronym; specify PET rather than just scan.
In Context
- "Gallium-68 DOTATATE PET revealed multiple hepatic metastases not visible on conventional CT imaging." — Nuclear medicine report
- "The negative gallium-68 DOTATATE PET suggested low somatostatin receptor expression in this pancreatic mass." — Imaging interpretation