| Li Mingsheng,Jiang Qinghuan,Liu Ya,Cheng Jinsheng.Study on step accuracy measurement and dose deviation of 252Cf neutron afterloading radiotherapy machine[J].Chinese Journal of Radiological Medicine and Protection,2017,37(8):626-629 |
| Study on step accuracy measurement and dose deviation of 252Cf neutron afterloading radiotherapy machine |
| Received:January 18, 2017 |
| DOI：10.3760/cma.j.issn.0254-5098.2017.08.014 |
| KeyWords:EBT3 film Double ion chamber method 252Cf neutron source |
| FundProject: |
| Author Name | Affiliation | E-mail | | Li Mingsheng | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevetion, Bejing 100088, China | | | Jiang Qinghuan | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevetion, Bejing 100088, China | | | Liu Ya | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevetion, Bejing 100088, China | | | Cheng Jinsheng | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevetion, Bejing 100088, China | addila@qq.com |
|
| Hits: 2522 |
| Download times: 1555 |
| Abstract:: |
| Objective To study the step accuracy of 252Cf neutron afterloading radiotherapy machine and the dose deviation caused by step deviation. Methods EBT3 film was used to measure the steps of the 252Cf neutron source, and then the center of each 252Cf neutron source was identified by measuring the optical density value by using the ImageJ software. Double ion chambersmethod was used to measure the dose deviation due to the 252Cf neutron source position shift. Results 252Cf neutron source step accuracy may amount to 0.01 mm using EBT3 film measurement, when 252Cf neutron source position deviation is less than 3 mm, the dose deviation is less than 2.5%. Conclusions The study on the step accuracy and position deviation of the 252Cf neutron source can provide a reference for the quality control standard of the 252Cf neutron afterloading radiotherapy machine. |
| HTML View Full Text View/Add Comment Download reader |
| Close |
|
|
|
