It was found that after the treatment of LDR the proliferation function of CFU-F increased, the supporting effect of CFU-F on CFU-GM and the adhesive capacity for bone marrow cells enhenced, especially in the groups treated with 50mGy and 75mGy.

• CFU－F基质层对粒系祖细胞集落形成单位（CFU－GM）的支持作用明显增加； CFU－F基质层对骨髓细胞的粘附能力在50、75mGy组有显著提高。