No abstract

No abstract

No abstract

No abstract

Delivering e ロ ough of a dose to a target tumor and avoiding unnecessary irradiation of the surrounding normal tissues as pDssibIe are of prlme importance in radiotherapy ． The most suitab 】 e trea 仁ment to obtain the therapentic ratio should be pursued ， For this purpose ， multilef − d量 aphragm conformation radiotherapy has been applied ． In 1981 ， we purchased a NELAC −10181inear acce ［ erator and developed the mono ・ block conformation system contro11ed micro computer in combination with NEC staff ． This system without a multileafdiaphragrn − (211) −