Results 331 to 340 of about 231,165 (373)

Dosage Units for High-Energy Radiation

Radiology, 1950
The study of radiation dosage measurement began twenty-five years ago with the main problem of establishing a system of x-ray dosage. It has been extended in recent years to many other types of radiation. It is important for us today to appreciate the fact that originally the establishment of a unit and method of x-ray dosage was thought to be, or ...
U. Fano, Lauriston S. Taylor
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Tissue Dosage from Interstitial Radiation

Radiology, 1936
THE calculation of tissue dosage from gold radon seeds in terms of a reproducible standard or unit is essential not only that we may know the dose administered to the tumor itself, but also to the surrounding healthy tissue. This is particularly important when external radiation is applied in addition to interstitial implants. Pending the establishment
H. L. Goltz, M. C. Reinhard
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Radiation dosage and complications in cervical cancer therapy

American Journal of Obstetrics and Gynecology, 1969
Computerized dosimetry in 346 patients treated by a combination of intracavitary and supervoltage radiotherapy has permitted a detailed analysis of dose delivered. The radiation delivered to the bladder, rectum, paracervical area, and the pelvic wall is described for a technique in which a calculated bladder and rectal tolerance was used as the ...
Alwin E. Schultz, Halvor Vermund, Joyce C. Kline, John R. Cameron, Ben M. Peckham   +4 more
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Diacetylenes as radiation dosage indicators

Radiation Physics and Chemistry (1977), 1981
Abstract It is shown that diacetylenes, RCCCCR are highly sensitive gamma ray dosage indicators. When exposed to high energy radiation, diacetylenes first partially polymerize to a blue or red color. The color intensifies with increasing dosage and finally, they undergo a color transition, blue (or red)-to-metallic.
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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
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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
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Effect of Radiation Dosage on the Results in Carcinoma of the Cervix

Radiology, 1952
It is well recognized that gradual improvement over the years in the apparatus and technic of radiation therapy has resulted in more effective treatment of cancer. In the series of cases of carcinoma of the cervix here presented, a change in equipment provided a dividing line for a demonstration of the influence of the factor of radiation dosage.
Leslie K. Sycamore, Edward C. Porter
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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.
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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
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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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