高能物理与核物理
高能物理與覈物理
고능물리여핵물리
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS
2001年
3期
271-276
,共6页
质子治疗%束流配送%软调制%双散射
質子治療%束流配送%軟調製%雙散射
질자치료%속류배송%연조제%쌍산사
质子治疗是一种新兴的放射治疗方法，它的主要优点是剂量分布特性优良，可以使高辐射剂量集中于肿瘤部位，减少对周围正常组织的损伤. 这一优点的实现主要依靠束流配送系统，它包含质子能量调节与调制、束流扩展和准直等功能. 现提出一种新的软调制双散射质子治疗束流配送系统. 其特点是利用程序控制质子能量变化以改变质子在体内的射程从而展宽Bragg峰，同时利用两次散射获得较大面积的均匀照射野. 它的优点是运行可靠、调节灵活，并特别有利于实现适形治疗.
質子治療是一種新興的放射治療方法，它的主要優點是劑量分佈特性優良，可以使高輻射劑量集中于腫瘤部位，減少對週圍正常組織的損傷. 這一優點的實現主要依靠束流配送繫統，它包含質子能量調節與調製、束流擴展和準直等功能. 現提齣一種新的軟調製雙散射質子治療束流配送繫統. 其特點是利用程序控製質子能量變化以改變質子在體內的射程從而展寬Bragg峰，同時利用兩次散射穫得較大麵積的均勻照射野. 它的優點是運行可靠、調節靈活，併特彆有利于實現適形治療.
질자치료시일충신흥적방사치료방법，타적주요우점시제량분포특성우량，가이사고복사제량집중우종류부위，감소대주위정상조직적손상. 저일우점적실현주요의고속류배송계통，타포함질자능량조절여조제、속류확전화준직등공능. 현제출일충신적연조제쌍산사질자치료속류배송계통. 기특점시이용정서공제질자능량변화이개변질자재체내적사정종이전관Bragg봉，동시이용량차산사획득교대면적적균균조사야. 타적우점시운행가고、조절령활，병특별유리우실현괄형치료.
The proton therapy is a new developing method in the radiation oncology. The superior dose localization capabilities of proton beams suggest the possibility of depositing a higher dose into the cancer while reducing the unwanted radiation damage in surrounding normal tissues. The merit can be realized with the aid of the beam delivery system, whose functions are energy adjustment, energy modulation, beam spreading and collimation. In this paper a new soft-modulating and double-scattering beam delivery system is proposed. It uses a program-controlled modulator to change proton energy and thereby the proton range in the body so that the Bragg peak is spread out. Moreover, a larger treatment field can be obtained with two scatterers. The delivery system has high reliability and flexibility, and is especially good for conformal therapy.
