peptide receptor imaging
Also written as: PRI
Nuclear medicine imaging technique using radiolabeled somatostatin analogs to detect neuroendocrine tumors.
Full Definition
Peptide receptor imaging encompasses nuclear medicine procedures that utilize radiolabeled peptides targeting somatostatin receptors expressed on neuroendocrine tumor cells. The most commonly used agents include 68Ga-DOTATOC, 68Ga-DOTATATE, and 68Ga-DOTANOC for PET/CT imaging, as well as 111In-octreotide for SPECT imaging. These imaging modalities are highly sensitive and specific for detecting NETs throughout the body, superior to conventional imaging for staging and restaging. The technique has revolutionized NET management by enabling early detection of disease, assessment of receptor expression for treatment planning, and monitoring of treatment response.
Usage
Usage note: Preferred imaging modality for NET staging; essential for PRRT eligibility assessment.
In Context
- "Peptide receptor imaging revealed multiple previously undetected bone metastases." — nuclear medicine report
- "High uptake on peptide receptor imaging predicted good response to PRRT." — treatment planning note