Verification of accuracy of positions and dose of ~(192)Ir source for China-made HM-HDR brachytherapy machine

[Objective] To verify the positions accuracy and dose accuracy of 192Ir source for China-made HM-HDR brachytherapy machine.[Methods] The source positions accuracy,the step distance,the length accordance of channels dwell positions,the repetition and the accuracy of source absorbed dose were measured and verified by the dummy source replacement and ionization chamber.[Results] The source positions accuracy,the source step distance accuracy,the length accordance of channels dwell positions,the repetition and the accuracy of source absorbed dose were in accord with the specification.They were consistent with the clinical requirement.[Conclusion] The verification of the accuracy of source positions and dose are necessary,and the verification methods are feasible.