Results 181 to 190 of about 13,471 (223)

RBE for non-stochastic effects

Advances in Space Research, 1992
Evidence 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.
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Heavy Ion RBE and Microdosimetric Spectra

Radiation Protection Dosimetry, 2002
Reliable 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
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RBE in radiotherapy with fast neutron beams

The British Journal of Radiology, 1985
We 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
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RBE of low energy electrons and photons

Physics in Medicine and Biology, 2010
Relative 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
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Accuracy of RBE: experimental and theoretical considerations

Radiation and Environmental Biophysics, 2010
The 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, W. Weyrather, T. Elsässer, DURANTE, MARCO, M. Scholz   +4 more
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RBE of Fast Neutrons for Apoptosis in Mouse Thymocytes

International Journal of Radiation Biology, 1995
We 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
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A proposed modification to the microdosimetric theory of RBE

Journal of Theoretical Biology, 1981
Abstract A discussion on some difficulties with the existing theory of microdosimetry (Kellerer & Rossi, 1972) leads to proposed modifications of the microdosimetric formalism which provide an explanation of the characteristic features of RBE without resort to a damage saturation mechanism.
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Appropriate RBEs for use in neutron therapy

The British Journal of Radiology, 1980
In her letter on “Gamma contamination of neutron beams”, Denekamp (1980) draws attention to the errors introduced by varied practices in quoting neutron dose with or without the contaminating gamma;-ray dose. She further points out that quoting the effective dose, i.e.
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Sensitivity of Micronucleus Induction in Human Lymphocytes to Low-LET Radiation Qualities: RBE and Correlation of RBE and LET

Radiation Research, 1994
To use the micronucleus (MN) assay as a biological dosimeter, it is essential that the dose response to different radiation qualities is known. In this paper we present dose-response curves for MN induction by X rays (14, 50 and 350 kVp) and 60Co gamma rays. The dose responses for 14 kVp compared to 50 kVp and for 350 kVp compared to 60Co were found to
F, Verhaegen, A, Vral
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Electron Spectra and the RBE of X Rays

Radiation Research, 2002
For 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
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