Short communication, Note
Estimation of the fraction of the energy of alpha particles emitted in the mineral part of the bone which is absorbed in the bone marrow
Z. Franić
; Institut za medicinska istraživanja i medicinu rada, Zagreb, Hrvatska
Abstract
The cells at particular carcinogenic risk in the skeleton are haematopoietic stem cells of the marrow, which are predominantly distributed throughout the haematopoietic marrow within the trabecular bone. The Monte Carlo method for estimating the fraction of the energy of alpha particles emitted in a volume of the mineral part of the bone which is deposited in the marrow is described. The relationship between the absorbed fraction (AF) of the alpha particles and their energy was found to be linear. AF (Red Marrow ← Trabecular Bone) is calculated to be 0.016 for the radionuclides emitting 3 MeV alpha particles and 0.080 for those emitting 8 MeV alpha particles.
As radionuclides are for purposes of bone dosimetry dichotomously classified as surface and volume seekers, the estimation of energy deposition in the skeletal target organs can be highly dependent on this classification because of complicated geometric relationships between the source and target regions.
Keywords
Hrčak ID:
152336
URI
Publication date:
26.7.1989.
Visits: 881 *