Results 181 to 190 of about 17,435 (223)
Some of the next articles are maybe not open access.
On the Question of RBE Reversal at High Doses
Radiation Research, 1992We present theoretical arguments to explain observations of a "reversal" of the RBE at relatively large doses; that is, the RBE of high-LET vs low-LET radiation is less than one. Numerical examples are given and the results of Bogo et al. (Radiat. Res. 118, 341-352, 1989) are discussed qualitatively.
M, Zaider, H H, Rossi
openaire +2 more sources
Heavy Ion RBE and Microdosimetric Spectra
Radiation Protection Dosimetry, 2002Reliable values for the relative biological effectiveness (RBE) of the complex field of heavy ions is essential for radiation therapy with carbon beams. Clinical experience with this novel form of therapy is still quite narrow and it is, therefore, desirable to compare and combine relevant clinical findings and theoretical approaches.
R, Gerlach, H, Roos, A M, Kellerer
openaire +2 more sources
RBE for non-stochastic effects
Advances in Space Research, 1992Evidence is reviewed concerning the variation of RBE values of high-LET radiations for non-stochastic effects, generally impairment of tissue integrity and function. The RBE values are dependent on the type of radiation, the type of tissue effect and the dose rate or fractionation schedule.
openaire +2 more sources
RBE in radiotherapy with fast neutron beams
The British Journal of Radiology, 1985We have to write in reply to the paper by Ellis and Weatherburn (1984) which proposed the inappropriate use of extrapolated animal experimental data in the preparation of iso-effective plans for neutron therapy. We would strongly advise against the adoption of their proposals.
W, Duncan, S J, Arnott, J R, Williams
openaire +2 more sources
RBE of low energy electrons and photons
Physics in Medicine and Biology, 2010Relative biological effectiveness (RBE) compares the severity of damage induced by a radiation under test at a dose D relative to the reference radiation D(x) for the same biological endpoint. RBE is an important parameter in estimation of risk from exposure to ionizing radiation (IR).
Hooshang, Nikjoo, Lennart, Lindborg
openaire +2 more sources
RBE of 14 MeV Neutrons in Barley
International Journal of Radiation Biology and Related Studies in Physics, Chemistry and Medicine, 1967SummaryThe effects of 14 meV neutrons were compared with those of 60Co γ-rays in barley seeds. After irradiation the seeds were germinated on wet filter paper and the lengths of the first leaf and coleoptiles were measured. The results for leaf growth can be fitted to an exponential function down to 20 per cent decrease for both types of irradiation ...
L, Cercek, M, Ebert, P, Frost, D, Greene
openaire +2 more sources
Accuracy of RBE: experimental and theoretical considerations
Radiation and Environmental Biophysics, 2010The concept of the relative biological effectiveness (RBE) is essential for treatment planning in carbon ion therapy and for understanding the biological effects of high-LET radiation. As this quantity depends on many factors, both its experimental determination and the assessment of its uncertainty are not trivial.
T. Friedrich +4 more
openaire +3 more sources
RBE of Fast Neutrons for Apoptosis in Mouse Thymocytes
International Journal of Radiation Biology, 1995We compared apoptosis in mouse thymocytes following exposure to low doses of high linear energy transfer (LET), 62.5-MeV (p-->Be+) fast neutrons and low LET, 4-MeV photons by flow cytometric analysis of hypodiploid cells. The incidence of apoptotic cell death rose steeply at very low radiation doses reaching a plateau of 3 Gy.
Warenius, HM, Down, JD
openaire +3 more sources
Electron Spectra and the RBE of X Rays
Radiation Research, 2002For an assessment of the possible difference in effectiveness between mammography X rays and conventional X rays, the energy and LET spectra of the released electrons are examined. At photon energies below 20 keV and above 100 keV, the energy of the electrons increases with increasing photon energy, which implies that higher-energy photons produce less
openaire +2 more sources
1965
Early animal work with the 15MeV linear accelerator at St. Bartholomew’s Hospital indicated that the R.B.E. for electrons compared to 250 kV X-rays was 0.86. This figure was obtained by measuring the L.D.50 for mice subjected to whole-body irradiation.
openaire +1 more source
Early animal work with the 15MeV linear accelerator at St. Bartholomew’s Hospital indicated that the R.B.E. for electrons compared to 250 kV X-rays was 0.86. This figure was obtained by measuring the L.D.50 for mice subjected to whole-body irradiation.
openaire +1 more source