近年来,近距离放射性治疗已成为治疗肿瘤的重要手段之一。国内外相继研制出低能射线的放射性粒子,俗称“种子源”,可直接置入肿瘤内部,进行体内近距离治疗。这就要求种子源的剂量既要达到治疗的目的,又不会对病人正常组织造成伤害。因此,建立一套能够准确测量、定位的种子源剂量测量系统具有现实意义。 In recent years, brachytherapy has become one of the important means of cancer treatment. At home and abroad have developed low-energy radioactive particles, commonly known as “seed source”, can be directly placed inside the tumor, the body brachytherapy. This requires that the dose of the seed source should reach the goal of treatment without harming the normal tissue of the patient. Therefore, it is of practical significance to establish a seed metering system that can measure and locate accurately.