[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 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.
Vasil'ev
V N
VN
Kokontsev
A A
AA
D016001:Confidence Intervals; D005069:Evaluation Studies as Topic; D006801:Humans; D019047:Phantoms, Imaging; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy / Q000295:instrumentation*