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东大的一个研究小组,最近研制了一种能简便地发现癌症的新装置,用于诊断肝癌、胰癌等癌肿。新装置是采用回旋加速器制造出能释放正电子的放射性同位素一碳11、氟18等,以此合成葡萄糖和蛋氨酸等糖类和氨基酸并注入体内。经放射性同位素处理的这种葡萄糖和氨基酸在体内放射出微量的γ射线。用正
A research team of Dongda University has recently developed a new device that can easily detect cancer and is used to diagnose cancers such as liver cancer and pancreatic cancer. The new device uses a cyclotron to produce positron-emitting radioactive isotopes, such as carbon-11 and fluorine-18, to synthesize sugars and amino acids such as glucose and methionine and to inject them into the body. The radioisotope-treated glucose and amino acids emit tiny amounts of gamma rays in the body. Positive