Twenty-seven patients received boron neutron capture therapy during craniot
omy at our research reactor from 1991 to 1999. This is a form of intra-oper
ative radiation therapy, which uses neutrons fi-om a nuclear reactor. There
are three additional major problems to anaesthetists: boron neutron captur
e therapy must be given beside the nuclear reactor, with no hospital facili
ties; neutrons cannot be shielded effectively by ordinary protectors; and n
eutrons are detrimental to metal devices and especially to electrical appli
ances. Boron neutron capture therapy has been adopted as an effective thera
py for glioblastoma/astrocytoma, but special considerations are required fo
r anaesthesia.