探讨了正常皮肤对重离子辐照急性损伤反应的耐受性,为重离子治癌临床应用提供安全性检测的实验依据.实验前10min,实验猪肌肉注射复方氯胺酮1.2mg/kg进行麻醉,然后在兰州重离子研究装置(HIRFL)辐照终端利用12C6+束照射,辐照剂量分别为0,12,21和27Gy,辐照分3次完成,剂量率约为1.2Gy/min,Bragg峰区照射,辐照后每隔7d对照射野拍照并活检取样,做HE组织病理学观察.不同剂量12C6+离子束辐照实验猪皮肤后,皮肤外观反应随辐照剂量增大而加快,表现为肿胀和色素沉积等;皮肤组织结构的变化明显,上皮细胞排列紊乱、萎缩、空泡变性;基本恢复正常所需时间也越长,且都存在明显的剂量效应关系.结果表明,辐照剂量范围为0-27Gy时,重离子对正常皮肤的辐照是安全的.
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