Measurements of radiation depth-dose curves of radiotherapy device RTA

Depth doses for radiation of superficial x-ray therapy unit RTA were measured in tissue-equivalent medium using an ionizing chamber. The measurements were made for high voltage (30-80 kV), treatment cone 8 cm in diameter and source-surface distance 30 cm. Necessary correction of the results was perf...

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Bibliographic Details
Published inMeditsinskaia tekhnika no. 5; p. 11
Main Authors Vasil'ev, V N, Kokontsev, A A
Format Journal Article
LanguageRussian
Published Russia (Federation) 01.09.1997
Subjects
Confidence Intervals
Evaluation Studies as Topic
Humans
Phantoms, Imaging
Radiotherapy Dosage
Radiotherapy, High-Energy - instrumentation
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Summary:Depth doses for radiation of superficial x-ray therapy unit RTA were measured in tissue-equivalent medium using an ionizing chamber. The measurements were made for high voltage (30-80 kV), treatment cone 8 cm in diameter and source-surface distance 30 cm. Necessary correction of the results was performed and the estimated error on a half-dose level was equal to 5.3% in 95% confidence interval. The results were in good agreement with Markus and Kasten's data but in disagreement with the data from current guide of practice on superficial x-ray therapy and the difference in half-dose level was up to two times.
ISSN:0025-8075