Relative surface doses from supervoltage radiation
Journal Article
·
· Radiology, v. 109, no. 2, pp. 437-442
OSTI ID:4422986
Ionization ndeasurements were taken to determine the relative surface dose for several supervoltage modalities. The relationship of relative surface dose and the physical treatment variables was studied for a Varian 4-MeV accelerator. Comparisons were then made between 4-MeV (with 2 different flattening filters), 6-MeV, and cobalt-60 radiation. For a given therapy unit, dependent variables for skin doses are target-skin distance, field size, shadow tray-skin distance, tray construction, beam entrance angle, distance on skin frond central axis, and any beam modifying devices such as wedges. Loss of skin sparing for megavoltage therapy results from electron contamination arising from unfavorable combinations of these variables. (auth)
- Research Organization:
- Yale Univ., New Haven
- NSA Number:
- NSA-29-000659
- OSTI ID:
- 4422986
- Journal Information:
- Radiology, v. 109, no. 2, pp. 437-442, Journal Name: Radiology, v. 109, no. 2, pp. 437-442; ISSN RADLA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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