title: Positron emission tomography for the evaluation of pancreatic disease.
abstract: Efficient techniques for native-labeling of amino acids have been combined successfully with emission tomography to yield significant improvements in pancreatic imaging. Carbon-11-labeled tryptophan appears to be the best agent available currently for imaging the pancreas. Optimum scanning times begin 30 min after tracer administration. Positron emission tomography with 11C-tryptophan is capable of defining both morphological and functional alterations in the pancreas. Tumors as small as 2 cm in diameter can be detected, but reliable differentiation of pancreatic cancer from pancreatis may not be possible even with this improved imaging technique. Longitudinal multiplane emission tomography in single-photon mode with the Pho/Con provides an efficient and satisfactory approach to pancreatic imaging with the positron-emitting radiopharmaceuticals.
mesh_terms: D002250:Carbon Radioisotopes; D006801:Humans; D007553:Isotope Labeling; D010179:Pancreas / Q000000981:diagnostic imaging; D010182:Pancreatic Diseases / Q000000981:diagnostic imaging*; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging; D010195:Pancreatitis / Q000000981:diagnostic imaging; D011829:Radiation Dosage; D014055:Tomography, Emission-Computed; D014364:Tryptophan
chemical_list: D002250:Carbon Radioisotopes; D014364:Tryptophan