胰腺疾患的检查方法较多,然各有其局限性。放射性核素胰腺显像是一种安全、简便、无创伤性体外显像方法,可供胰腺疾患的初筛诊断。原理胰腺兼有内、外分泌功能,其中外分泌细胞分泌消化液一胰液,主要成份为无机盐和多种消化酶。在合成消化酶的过程中,需摄取多种氨基酸(包括蛋氨酸)。由于硒(Se)与硫的化学性质相近,以放射性核素~(75)Se替代蛋氨酸中的硫而成为~(75)Se—蛋氨酸,其生物学特性 There are many methods for examining pancreatic diseases, but each has its own limitations. Radionuclide pancreas imaging is a safe, simple and non-invasive in vitro imaging method for the diagnosis of pancreatic disease. Principles The pancreas has both internal and exocrine functions, in which the exocrine cells secrete a pancreatic juice, which is mainly composed of inorganic salts and various digestive enzymes. During the synthesis of digestive enzymes, a variety of amino acids (including methionine) are ingested. Due to the similar chemical properties of selenium (Se) and sulfur, the use of radionuclide ~ (75) Se to replace sulfur in methionine to become ~ (75) Se - methionine, its biological characteristics