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从1968～1986年对32例后颅窝成神经管细胞瘤作了脑脊柱轴照射。全脑用光子线平行对穿野照射,包括其脑膜并向下延伸到C_(6、7)水平。脊柱野用10～35MeV电子线照射,患者俯卧,胸前垫高5～10cm,以保持皮肤表面尽可能平行。照射野上接光子野下缘,下至S_(2-3),SSD一般为110 cm±3cm,野长10cm,宽5～8 cm,用移动野技术。全脑放射剂量30～37.5Gy,20次/5周,脊髓剂量35
From 1968 to 1986, 32 cases of posterior fossa medulloblastoma were irradiated with cranial axis. Whole brain photoplethysm parallel to the field exposure, including its meninges and extends down to C_ (6,7) level. Spine field with 10 ~ 35MeV electron beam irradiation, the patient prone, chest padding 5 ~ 10cm, in order to keep the skin surface as parallel as possible. In the irradiation field, the lower edge of the photon field is irradiated down to S_ (2-3), the SSD is generally 110 cm ± 3 cm, the length of the field is 10 cm, and the width is 5 to 8 cm. The mobile field technique is used. Whole brain radiation dose 30 ~ 37.5Gy, 20 times / 5 weeks, spinal dose 35