Dear All,
I have used a radiameter which displays results in micro-sievert per hour in order to measure leakage radiation dose around jaws and I have obtained a value of 40 micro-sievert per hour just after finishing patient radiotherapy treatment. My question is what's the threshold value in which there is a potential radiation leakage problem.
Thanks,
What I know, the level of leakage radiation is usually defined by the manufacturer. The level of leakage radiation should be measured when field is not open (0x0). There is not specific limit for patient; the operator definitely remains outside. I feel, you dont need to bother about leakage radiation level.
You may be interested in the following papers
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3119954/
https://www.ncbi.nlm.nih.gov/pubmed/17022250
https://www.ncbi.nlm.nih.gov/pubmed/17351504
https://www.ncbi.nlm.nih.gov/pubmed/27685101
Dear Muhammad SHAHID, Jasna Davidovic and Nobuyuki Hamada,
Thank you so much.
We have performed comprehensive measurements on Bhabhatron unit. Following link may be of use:
https://www.researchgate.net/publication/24442808_Compliance_of_Bhabhatron-II_telecobalt_unit_with_IEC_standard_-_Radiation_safety
Hi,
Concerning leakage radiation and a linac, I would recommend that you take a look at the IEC "linac standard", IEC 60601-2-1, Medical electrical equipment – Part 2-1: Particular requirements for the basic safety and essential performance of electron accelerators in the range 1 MeV to 50 MeV, Edition 3.1 2014-07. There is a separate subclause on "LEAKAGE RADIATION through BEAM LIMITING DEVICES", describing requirements on absorbed dose levels and corresponding tests.
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