Results 261 to 270 of about 936,741 (303)

External β-Doses from Radioactive Fallout

Health Physics, 1959
Information is presented on external beta -radiation doses from fall- out material, and some evaluation of the biological hazard is made. A brief review is given of past laboratory data on external radiation exposures and their effects upon the skin. Consideration is given to estimating potential external beta -doses from fallout based on field data ...
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Specification of the Dose to Organs at Risk in External Beam Radiotherapy

Acta Oncologica, 1997
Reporting of the clinical relevant dose to organs at risk (OR) and other normal tissues is crucial in trials and protocols where the aim is to assess late complications and to increase the therapeutic ratio for external beam radiotherapy. The dose distribution in normal tissues and ORs are, however, most often heterogeneous, at least when more than two
E, Dale, D R, Olsen
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The Calculation of the Dose to Lymphocytes in External Beam Radiation Therapy

Radiation Research, 1981
Lymphopenia is known to occur in patients undergoing external beam radiation therapy when the radiation fields encompass major blood vessels and lymphatic tissue. The dose received by the lymphocytes has up to now not been determined. We present here a general formalism for the calculation of the lymphocyte dose for a patient undergoing fractionated ...
K E, Ekstrand, R L, Dixon, S, Plunkett, M, Raben   +3 more
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External beam radiotherapy dose response of prostate cancer

International Journal of Radiation Oncology*Biology*Physics, 1997
To determine the external beam radiotherapy dose response of palpable Stage T1-T4, mostly Nx, patients with adenocarcinoma of the prostate.There were 938 men consecutively treated between 1987 and 1995 who had pretreatment prostate specific antigen (PSA) levels.
A, Pollack, G K, Zagars
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Radiation doses of Swiss population from external sources

Journal of Environmental Radioactivity, 2002
The outdoor radiation exposure of the population in Switzerland from external sources results from cosmic background as well as from natural and artificial ground radiation. The geographical distribution of these components and of the total dose rate are represented on maps consisting of 2 kmx2 km grid cells.
Rybach L, Bächler D, Bucher B, Schwarz G   +3 more
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Measurement of the individual dose of external irradiation

Atomic Energy, 1999
The relation between the dose recorded with an individual tissue-equivalent luminescence dosimeter and the effective dose obtained by the human body is calculated. The scattering of γ rays in the human body and the surrounding space is taken into account.
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External dose estimates for future inhabitants of Eniwetok Atoll

Nature, 1975
Measurements of environmental γ radiation levels on Eniwetok Atoll were combined with pertinent population distributions and expected future life styles to assess the external doses that could be received by the Marshallese people on their return to the former US nuclear weapons test site in the Pacific.
P H, Gudiksen, D E, Jones, H L, Beck, J E, McLaughlin, T P, Stuart, O D, Lynch   +5 more
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External and internal dose in subjects occupationally exposed to ochratoxin A

International Archives of Occupational and Environmental Health, 2002
Ochratoxin A (OA) is a ubiquitous mycotoxin that can contaminate foods, drinks, and animal feeds worldwide. Humans and animals can therefore absorb this toxin via the gastrointestinal tract after ingestion of contaminated products. OA is known to exert toxic effects, particularly on the renal system, and the International Agency for Research on Cancer (
IAVICOLI, Ivo, Brera, Carlo, Carelli, Giovanni, Caputi, Rosamaria, Marinaccio, Alessandro, Miraglia, Marina   +5 more
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Interinstitutional experience in verification of external photon dose calculations

International Journal of Radiation Oncology*Biology*Physics, 1991
Under the auspices of NCI contracts, four institutions have collaborated to assess the accuracy of the pixel-based dose calculation methods they employ for external photon treatment planning. The approach relied on comparing calculations using each group's algorithm with measurements in phantoms of increasing complexity.
Mary Ellen Masterson, Glenn Barest, Chen-Shou Chui, Karen P. Doppke, Robert D. Epperson, William B. Harms, Kenneth E. Krippner, Radhe Mohan, Eric D. Slessinger, Marc R. Sontag, Marcia M. Urie, Robert E. Wallace, John W. Wong   +12 more
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Effects of Low Doses and Low Dose Rates of External Ionizing Radiation

Radiation Research, 1995
This letter refers to a recent study reported in Radiation Research on the above subject by Cardis et al. (1). In view of the uncertainties and wide differences of opinions on the possible health effects of low-level exposures, the analysis of the pooled data from three countries is a very timely and commendable effort. However, we feel that there is a
D. V. Gopinath, K. S. V. Nambi
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