Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Review
. 2004;112(4):471-81.
doi: 10.1093/rpd/nch091.

The Variation in Biological Effectiveness of X-rays and Gamma Rays With Energy

Affiliations
Review

The Variation in Biological Effectiveness of X-rays and Gamma Rays With Energy

M A Hill. Radiat Prot Dosimetry. .

Abstract

The ICRP has attributed the same relative risk for all low-LET (linear energy transfer) radiations, including X and gamma radiations of all energies. However, very low energy X-rays are expected to be more biologically effective, per unit absorbed dose, than high energy X-rays or gamma rays due to the production of lower energy secondary electrons, with a correspondingly higher LET. This increase in relative biological effectiveness (RBE) is also seen experimentally for a range of biological end-points, however, a wide range of RBE values have been reported. The assessment of risks is particularly important due to the use of low energy X-rays for mammography screening. A review of the published data on the variation in biological effectiveness with energy is presented here.

Similar articles

See all similar articles

Cited by 19 articles

See all "Cited by" articles

LinkOut - more resources

Feedback