The liver cancer cell BEL7402 surviving fraction did not change obviously after 24 hours or 48 hours hypoxia, whereas, those which were radiated with hypoxia compared with not increased obviously.

• 缺氧24h与48h组的肝癌细胞株BEL7402存活分数变化不明显,加照射后的实验组则明显下降而缺氧加放射组与单纯放射组比较细胞存活分数明显升高。