【摘要】 放疗仪器是利用电离辐射对肿瘤进行治疗的装置;近距离放疗仪器是指将封装好的放射源经人体腔道放在肿瘤体附近或表面,或是将细针管插植于肿瘤体内导入射线源实施照射的放疗技术。通过改变射束剖面强度分布,达到形状适形和剂量适形,叫做调强适形放疗技术。更多还原

【Abstract】 Radiotherapy instrument is used for the treatment of tumor by ionizing radiation. Brachytherapy means placing packed radioactive source near or on the surface of tumor via body cavity, or embedding fine needle in tumor to import radioactive source. Intensity modulated radiation therapy means achieving form conformity and dose conformity by altering intensity distribution of pencil section.更多还原