Results 151 to 160 of about 16,998 (193)
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The British Journal of Radiology, 1968
The apparent lack of agreement among various authors (Belli and Roach, 1968; Baker and Town, 1966; Michael, Scott and Revesz, 1966) on the rate of de-oxygenation of a culture medium suddenly exposed to an oxygen-free environment, is probably attributable to differences in the dimensions of the various media studied.
F C, Gillespie, J, Unsworth
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The apparent lack of agreement among various authors (Belli and Roach, 1968; Baker and Town, 1966; Michael, Scott and Revesz, 1966) on the rate of de-oxygenation of a culture medium suddenly exposed to an oxygen-free environment, is probably attributable to differences in the dimensions of the various media studied.
F C, Gillespie, J, Unsworth
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The British Journal of Radiology, 1970
The importance of hypoxia in radiobiology and radiotherapy continues to occupy much space in this journal (Littbrand and Revesz, 1969; Berry, Hall and Cavanagh, 1970). In spite of the excellent review by Boag (1969) we feel the pitfalls, namely: (a) variation in height of medium with its subsequent effect on oxygen diffusion and cell numbers; (b) the ...
J L, Moore, C W, Smith
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The importance of hypoxia in radiobiology and radiotherapy continues to occupy much space in this journal (Littbrand and Revesz, 1969; Berry, Hall and Cavanagh, 1970). In spite of the excellent review by Boag (1969) we feel the pitfalls, namely: (a) variation in height of medium with its subsequent effect on oxygen diffusion and cell numbers; (b) the ...
J L, Moore, C W, Smith
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The Radiobiology of Radiosurgery
Neurosurgery Clinics of North America, 1999Radiosurgery is the precise and complete destruction of a chosen target containing healthy or pathological cells, without significant concomitant or late radiation damage to adjacent cells. This article discusses briefly the many uses of radiobiology and considers variables in the treatment, such as dose rate, dose homogeneity, and the issue of ...
D, Kondziolka +2 more
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Radiotherapy, radiobiology—can radiobiology contribute?
The British Journal of Radiology, 1973Abstract This paper tries to compare the relatively short time in which radiobiology could make a significant contribution to cancer therapy-in contrast to about two decades in which fundamental research into the initial mechanisms of radiobiological damage may be expected to have a significant effect.
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American Journal of Clinical Oncology, 1988
Experimental studies of the biological effects of radiation were started soon after the discoveries of x-rays in 1895, but there is still much that is not known. This article includes some research objectives that are essentially pragmatic in nature, intended to support and improve the current practice of radiotherapy, but the central thrust is the ...
Eric J. Hall +14 more
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Experimental studies of the biological effects of radiation were started soon after the discoveries of x-rays in 1895, but there is still much that is not known. This article includes some research objectives that are essentially pragmatic in nature, intended to support and improve the current practice of radiotherapy, but the central thrust is the ...
Eric J. Hall +14 more
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International Journal of Radiation Oncology*Biology*Physics, 1982
Abstract Tumor responses depend on a number of factors, of which the intrinsic radiosensitivity of the cells and their oxygenation condition can be considered as most important. Variations of the sensitivity in the cell cycle and differences between resting and proliferating cells are considered to play a smaller part.
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Abstract Tumor responses depend on a number of factors, of which the intrinsic radiosensitivity of the cells and their oxygenation condition can be considered as most important. Variations of the sensitivity in the cell cycle and differences between resting and proliferating cells are considered to play a smaller part.
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The Radiobiology of Hypofractionation
Clinical Oncology, 2015If the α/β ratio is high (e.g. 10 Gy) for tumour clonogen killing, but low (e.g. 3 Gy) for late normal tissue complications, then delivering external beam radiotherapy in a large number (20-30) of small (≈2 Gy) dose fractions should yield the highest 'therapeutic ratio'; this is demonstrated via the linear-quadratic model of cell killing. However, this
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2007
The effects of radiosurgery on brain tumor tissue remain to be defined. Effects are dose, volume, time, and tumor histology dependent. In this report, we discuss data from resected specimens after radiosurgery, and work to develop a classification method for radiosurgery effects.
Douglas, Kondziolka +3 more
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The effects of radiosurgery on brain tumor tissue remain to be defined. Effects are dose, volume, time, and tumor histology dependent. In this report, we discuss data from resected specimens after radiosurgery, and work to develop a classification method for radiosurgery effects.
Douglas, Kondziolka +3 more
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Journal of the American Veterinary Medical Association, 1971
SUMMARY Approximate median lethal dosages (ld50) for several species of reptiles are presented, ranging from 300 to 400 R for snakes to 1,030 R for box turtles. The principal lethal damage seems to be to the hematopoietic system, but changes are much more gradual and prolonged than in mammalian systems, necessitating the use of a 90-day period for ...
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SUMMARY Approximate median lethal dosages (ld50) for several species of reptiles are presented, ranging from 300 to 400 R for snakes to 1,030 R for box turtles. The principal lethal damage seems to be to the hematopoietic system, but changes are much more gradual and prolonged than in mammalian systems, necessitating the use of a 90-day period for ...
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Problems of Clinical Radiobiology
Radiology, 1951As indicated by the title, it is the object of this paper to give insight into some of the tasks which are to be taken up in radiobiological research at a radio-therapeutic cancer center. Since problems and not results are to be discussed, the lecture should only throw light on a field previously unheeded and on some of the means by which it may be ...
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