Site Specific Microbeam Irradiation: Defining a Bystander Effect. Final Technical Report

Brenner, David J.

Columbia University (United States)

关键词: Radiations;    72 Physics Of Elementary Particles And Fields;    Irradiation;    Photons;   

DOI  :  10.2172/821129
RP-ID  :  DOE/ER/62686-1
RP-ID  :  FG02-98ER62686
RP-ID  :  821129

美国|英语

来源: UNT Digital Library

【 摘 要 】

There is evidence that low-energy x-rays as used in mammography have an increased biological effectiveness relative to higher-energy photons. However, the RBE values are not large, probably less than 2. Thus it is unlikely that the radiation risk alone could prove to be a ''show stopper'' regarding screening mammography because, for older women, the benefit is likely to considerably outweigh the radiation risk. Nevertheless, the RBE for low-energy x-rays might reasonably be taken into account when assessing the recommended age to commence such annual screening.