已有很多文献报导,照射后微血管出现明显的超微结构改变。800伦丙种射线全身照射大鼠胃、小肠、结肠微血管通透性变化的研究说明,在放射出血与微血管壁损伤之间存在平行关系。小肠细胞分裂旺盛,对輻射敏感。全身照射肠管隐窝细胞的损伤不仅是由于射线的直接作用,而且与微血管的损伤有关。我们对射线敏感组织 It has been reported in many literatures that microvascular ultrastructural changes occur after irradiation. The study on the changes of microvessel permeability in the stomach, small intestine and colon of rats irradiated with Lunlun rays of the whole body shows that there is a parallel relationship between radiation hemorrhage and microvascular wall injury. Intestinal cell division strong, sensitive to radiation. Whole body irradiation The bowel recess cells damage not only due to the direct effects of radiation, but also with the microvascular damage. We are on a radiation-sensitive tissue