乳腺癌术后或胸壁复发时常需胸壁放射治疗,在电子束治疗还不普及的情况下,常用带有切线照射筒的钴60治疗机作切线照射。但此筒甚重,装卸不便,用以固定照射筒的螺丝很易磨损,有些钴治疗机则尚不带此设备,切线照射难以准确。为此作者设计了一套不用切线照射筒的胸壁切线照射方法,应用于旋转治疗机;在固定式治疗机上,如装 Chest wall radiotherapy is often required for postoperative breast cancer recurrence or chest wall recurrence. In the case where electron beam therapy is not yet popular, a cobalt 60 treatment machine with a tangential irradiation tube is often used for tangential irradiation. However, this tube is very heavy and it is inconvenient to load and unload. Screws used to fix the irradiation tube are very fragile. Some cobalt treatment machines do not have this equipment yet, and tangential irradiation is difficult to be accurate. For this reason, the author designed a chest wall tangential irradiation method that does not use a tangential irradiation tube, which is applied to a rotary treatment machine; on a fixed treatment machine, such as