Results 311 to 320 of about 2,377,244 (375)

Dosage Calculations for Oblique Beams of Radiation

Radiology, 1963
Isodose charts in general use are made for beams of radiation incident normally on the skin. In practice, it is often necessary or desirable to treat with the axis of the beam making some angle with the skin surface other than 90°. This situation can be rendered amenable to dose calculation with these isodose charts by the use of bolus.
Jean-Marc Legare, Lucille A. Du Sault
openaire   +2 more sources

Clinical Radiation Dosage, Part III: A Biological Factor in Radon and Isotope Dosage

The British Journal of Radiology, 1950
It has been shown that when relatively short-lived radioactive sources are used in therapy, there is a critical interval of time during which the biological efficacy is approaching a maximum. Clinical dosage prescriptions must be calculated for this critical interval. Doses based on longer or shorter time intervals are likely to prove excessive.
openaire   +3 more sources

A practical method for monitoring diagnostic radiation dosage in the newborn nursery.

Radiology, 1979
Diagnostic radiation exposure in 133 consecutive newborns was studied using a TLD monitoring system. Eighty-eight per cent of dosimeters received less than 1 mSv (100 mrem) total exposure. The mean exposure per chest radiograph was 0.044 +/- 0.023 mSv (4.
W. Smith, E. Gresham, R. Berg, L. Hobson, E. Franken, J. Smith   +5 more
semanticscholar   +1 more source

The computation of dosage in interstitial and intracavitary radiation therapy

Journal of Chronic Diseases, 1966
Abstract At this time, it seems likely that interstitial and intracavitary radiation therapy will be improved by the availability of isodose radiation distributions for individual treatments early in the treatment, or before the sources are applied with afterloading applicators.
Robert J. Shalek, Marilyn Stovall
openaire   +3 more sources

Some Mathematical Aspects of Radiation Dosage

Radiology, 1934
It is found that tissue exhibits a property of “recovery from radiation effects.” The rate of recovery is generally assumed to be exponential (1 and 2). Due to this property of recovery, the effective radiation dose (sometimes called cumulative) tends toward an equilibrium value, that is, a value at which the rate of recovery of the tissue equals the ...
J. G. Hoffman, M. C. Reinhard
openaire   +2 more sources

Radiation dosage of the ovaries during hysterosalpingography. Is radionuclide hysterosalpingography justified?

British Journal of Obstetrics and Gynaecology, 1989
Before the introduction of radionuclide hysterosalpingography in our clinic we measured the ovarian radiation exposure during hysterosalpingography (HSG) with fluoroscopy.
S. Kennedy, O. A. Mojiminiyi, N. Soper, B. Shepstone, D. Barlow   +4 more
semanticscholar   +1 more source

THE DOSAGE OF ULTRAVIOLET RADIATION IN INFANTS WITH TETANY

JAMA: The Journal of the American Medical Association, 1930
ABSTRACT It is curious how little attention is paid to the subject of dosage in treatment with ultraviolet radiant energy. There is a widespread impression that, if excessive skin irritation is avoided, the greater the amount of ultraviolet radiation given, the better; yet numerous observations indicate that the effect is not proportional to the dosage
Harry Bakwin, Ruth Morris Bakwin
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The Homogeneity of Dosage Distribution in Radiation Teletherapy

The British Journal of Radiology, 1941
It has been the custom for a considerable period, to investigate the dosage in radiation teletherapy, in a plane passing centrally through the site of the lesion to be irradiated, or at a number of points distributed throughout the lesion. The radiation fields employed are usually approximately symmetrical about a central axis, and the dosage-rate ...
H. T. Flint, C. W. Wilson
openaire   +2 more sources

Effect of high gamma radiation dosage and elevated temperature on the mechanical performance of sustainable alkali-activated composite as a cleaner product

, 2021
M. Ramadan, M. Amin, S. Waly, Alaa Mohsen   +3 more
semanticscholar   +1 more source

PERSONAL DIARY OF RADIATION DOSAGE

Journal of the American Medical Association, 1951
I. PERSONAL RADIATION DIARIES This is a plea for the adoption of a nationally standardized personal radiation-diary system. The purpose of such a system would be to reduce to a readied exactness the composite previous irradiation record of any individual patient.
J. Sorrentino, H. G. Jacobson, M. H. Poppel   +2 more
openaire   +3 more sources