Results 221 to 230 of about 1,766,452 (265)
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Estimating the terrestrial gamma dose rate by decomposition of the ambient dose equivalent rate
Journal of Environmental Radioactivity, 2017An extensive network of dose rate monitoring stations continuously measures ambient dose rate across Europe, as part of the EURDEP system. Its purpose is early warning in radiological emergencies and documenting its temporal and spatial evolution.
P. Bossew +13 more
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Radiation Measurements, 1999
Calculations of total dose and equivalent dose as functions of time, as well as dose-rate and equivalent dose rate since event start are presented for fifteen of the larger solar particle events that occurred during the period between November 1987 and August 1991.
E N, Zapp +3 more
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Calculations of total dose and equivalent dose as functions of time, as well as dose-rate and equivalent dose rate since event start are presented for fifteen of the larger solar particle events that occurred during the period between November 1987 and August 1991.
E N, Zapp +3 more
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Radiation Oncology Investigations, 1998
Radiotherapy is administered with the assumption that all patients respond similarly to radiation although radiosensitivity does vary from patient to patient, resulting in different degrees of early and late effects. Because the dose given to a patient is limited by the response of normal tissue in the treatment field, it would be beneficial to ...
R C, Wilkins, C E, Ng, G P, Raaphorst
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Radiotherapy is administered with the assumption that all patients respond similarly to radiation although radiosensitivity does vary from patient to patient, resulting in different degrees of early and late effects. Because the dose given to a patient is limited by the response of normal tissue in the treatment field, it would be beneficial to ...
R C, Wilkins, C E, Ng, G P, Raaphorst
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International Journal of Radiation Oncology*Biology*Physics, 1996
Pulsed dose rate (PDR) brachytherapy is a new type of afterloading brachytherapy (BT) in which a continuous low dose rate (LDR) treatment is simulated by a series of "pulses," i.e., fractions of short duration (less than 0.5 h) with intervals between fractions of 1 to a few hours. At the Dr.
A G, Visser +2 more
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Pulsed dose rate (PDR) brachytherapy is a new type of afterloading brachytherapy (BT) in which a continuous low dose rate (LDR) treatment is simulated by a series of "pulses," i.e., fractions of short duration (less than 0.5 h) with intervals between fractions of 1 to a few hours. At the Dr.
A G, Visser +2 more
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Conversion of beta-ray dose rates measured in air to dose rates in skin
Physics in Medicine & Biology, 1975Some results of recent experimental measurements of the contribution of back-scattered beta radiation to the dose at a tissue surface are presented. Measurements have been made with two independent techniques, one involving extrapolation ionization chambers, the other calcium sulphate thermoluminescence dosimeters. The measurements were made in contact
J R, Harvey +3 more
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Influence of total dose and dose rate in carcinogenicity studies
Journal of Toxicology and Environmental Health, 1985One element of the ED01 Study contained a group of animals that were dosed with 2-acetylaminofluorene for 9, 12, 15, 18, or 24 mo and then sacrificed at 18 or 24 mo. This provided data to compare the relative effects on carcinogenicity of dose rate versus total dose. The prevalence of liver and bladder tumors were used as the comparison.
N A, Littlefield, D W, Gaylor
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The British Journal of Radiology, 1965
A model is proposed for the effect of dose-rate on the survival curve. The model leads to a set of differential equations, which are solved numerically. The parameters of the model have been fitted to published data on the survival of HeLa S3 cells, and a satisfactory fit obtained.
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A model is proposed for the effect of dose-rate on the survival curve. The model leads to a set of differential equations, which are solved numerically. The parameters of the model have been fitted to published data on the survival of HeLa S3 cells, and a satisfactory fit obtained.
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Effect of variable dose rate on biologically effective dose
International Journal of Radiation Biology, 2013To investigate the effect of variable dose rate on biologically effective dose (BED).By using the linear-quadratic (LQ) model with bi-exponential repair, we analytically determine the time-dependent dose rate [Formula: see text] which minimizes the effective protraction factor (Geff) and BED under the condition of fixed fraction time and dose per ...
Vadim Y, Kuperman, Greg S, Spradlin
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Pulsed dose rate brachytherapy
Clinical and Translational Oncology, 2008Pulsed dose rate (PDR) is a new modality for dose delivery in brachytherapy. It uses modern afterloading technology (miniaturized source, cable driven, software controlled), with source activities in the range of 1 Ci, which is actually one tenth of the normal activity used for high dose rate (HDR) brachytherapy.
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Comparison of Repair Rates Determined by Split-Dose and Dose-Rate Methods
Radiation Research, 1980BRABY, L. A., NELSON, J. M., AND ROESCH, W. C. Comparison of Repair Rates Determined by Split-Dose and Dose-Rate Methods. Radiat. Res. 82, 211-214 (1980). Both split-dose and dose-rate techniques have been used to investigate sublethal damage repair in Chlamydomonas reinhardi irradiated with fast electrons.
L. A. Braby, J. M. Nelson, W. C. Roesch
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