抄録
1) Chest radiographies were carried out during and after the course of post-operative radiation treatment of breast cancer.
2) Radiation pneumonia and fibrosis was observed 67 per cent of them.
3) Sharp boundary exsisted at about 4500r, which was delivered in the lung field in the question.
4) No dependence of wave length was observed in gamma and X ray therapy in respects, to dose and over-all-time of exposure.
