[Estimation of the energy fraction emitted by alpha particles in the mineralized part of trabecular bone which is absorbed in the bone marrow].
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.
Franić
Z
Z
D000512:Alpha Particles; D001853:Bone Marrow / Q000528:radiation effects*; D001842:Bone and Bones / Q000528:radiation effects*; D006801:Humans; D011829:Radiation Dosage
Procjena frakcije energije alfa cestica emitiranih iz mineralnog dijela trabekularne kosti, apsorbirane u kostanoj mozdini.