Results 241 to 250 of about 6,005,333 (282)
Some of the next articles are maybe not open access.
Lineal Energy Calibration of a Spherical TEPC.
Radiation Protection Dosimetry, 2015Tissue-equivalent proportional counters (TEPCs) do not always allow built-in calibration alpha-particle sources, and the lineal energy calibration of these counters must be performed with an external radiation able to penetrate the detector walls. The irradiation field can be used for calibration if a particular marker point of known lineal energy is ...
Sabina Chiriotti, Valeria Conte, D Moro
exaly +3 more sources
Alpha-Particle Lineal Energy Spectra for the Human Lung
International Journal of Radiation Biology, 2002To determine the distribution of lineal energy in the target cells and the parameters of distribution for various combinations of sources, targets and energies in the human tracheobronchial tree. Frequency average and average of the square of the lineal energy were also calculated from the lineal energy distribution.A model was created to simulate the ...
Dragoslav Nikezic, Peter K. N. Yu
exaly +3 more sources
Physics in Medicine and Biology, 2013
Microdosimetry is a recommended method for characterizing radiation quality in situations when the biological effectiveness under test is not well known. In such situations, the radiation beams are described by their lineal energy probability distributions.
Hooshang Nikjoo, L Lindborg
exaly +3 more sources
Microdosimetry is a recommended method for characterizing radiation quality in situations when the biological effectiveness under test is not well known. In such situations, the radiation beams are described by their lineal energy probability distributions.
Hooshang Nikjoo, L Lindborg
exaly +3 more sources
Dose Mean Lineal Energy for Neutrons
Radiation Protection Dosimetry, 1990Abstract Several proposals have been presented recently (ICRU 40, Zaider and Brenner, Kellerer) on the definition of the quality factor for charged particles on lineal energy density rather than on LET. The models of ICRU 40 and Kellerer result in a direct proportionality of the quality factor to y in the lower range of y up to about ...
Leuthold, G.P., Burger, G.T.
openaire +2 more sources
Lineal energy as a function of site size for HZE radiation
Radiation Protection Dosimetry, 2006Monte Carlo calculations have been used to estimate the frequency and magnitude of energy deposition events produced by delta rays originating with high atomic number, high-energy, primary particles. The results show that the spectrum of delta rays incident on small targets is relatively insensitive to primary particle velocity or distance to the ...
X, Wang, H, Liu, Z, Xia, L A, Braby
openaire +2 more sources
Physical and Engineering Sciences in Medicine, 2020
With the extension of ion species in ion-beam radiotherapy, the sole dependence of relative biological effectiveness (RBE) on linear energy transfer (LET) is insufficient when comparing RBE for ion beams with the same LET value. The aim of the present study was to provide a systematic study of the nanodosimetry for ion beams with the same LET value ...
Pengbo He, Weiqiang Chen, Xinguo Liu
exaly +3 more sources
With the extension of ion species in ion-beam radiotherapy, the sole dependence of relative biological effectiveness (RBE) on linear energy transfer (LET) is insufficient when comparing RBE for ion beams with the same LET value. The aim of the present study was to provide a systematic study of the nanodosimetry for ion beams with the same LET value ...
Pengbo He, Weiqiang Chen, Xinguo Liu
exaly +3 more sources
An Algorithm for Determining the Proximity Distribution from Dose-Averaged Lineal Energies
Radiation Research, 1982An algorithm is proposed for determining the proximity distribution of energy transfers from measured dose-averaged lineal energies. The applicability of the algorithm is illustrated with a calculation for a60 Co beam based on a set of experimental $y_{{\rm D}}$ values. Practical methods for using the proposed algorithm are discussed.
M, Zaider +3 more
openaire +2 more sources
Dose Mean Lineal Energy for Fast Neutrons in Small Spherical Targets
Radiation Protection Dosimetry, 1988Abstract The calculation of microdosimetric distributions for neutrons, has so far been performed for target sizes in the micrometre region, where the LET approximation is valid. In small spherical targets straggling and d ray effects strongly influence the energy deposition.
Leuthold, G.P., Burger, G.T.
openaire +2 more sources
Radiation Research, 2004
In view of recent recommendations on the frequency and the starting age of mammography screening in healthy women, it is desirable to quantify the enhanced relative biological effectiveness (RBE) of mammography X rays compared to hard X rays. While there is little doubt that the former are more potent in inducing biological damage than the latter, the ...
Brigitte Reniers
exaly +3 more sources
In view of recent recommendations on the frequency and the starting age of mammography screening in healthy women, it is desirable to quantify the enhanced relative biological effectiveness (RBE) of mammography X rays compared to hard X rays. While there is little doubt that the former are more potent in inducing biological damage than the latter, the ...
Brigitte Reniers
exaly +3 more sources
Radiation Protection Dosimetry, 2002
Megavoltage photon beams are routinely used for external-beam radiotherapy. Recently, new treatment modalities based on dynamic and intensity modulated (IM), beam delivery systems are increasingly used in clinical practice. The purpose of this work is to investigate the energy spectrum and microdosimetric features of these photon beams.
H H, Liu, F, Verhaegen
openaire +2 more sources
Megavoltage photon beams are routinely used for external-beam radiotherapy. Recently, new treatment modalities based on dynamic and intensity modulated (IM), beam delivery systems are increasingly used in clinical practice. The purpose of this work is to investigate the energy spectrum and microdosimetric features of these photon beams.
H H, Liu, F, Verhaegen
openaire +2 more sources