| Ge Ning,Han Dongliang,Yi Fengtao,Gu Shiyong,Chen Fuci,Wang Zhibin.Significance of radiological protection of sensitive organs in non-treated region in body γ-knife treatment[J].Chinese Journal of Radiological Medicine and Protection,2016,36(6):456-460 |
| Significance of radiological protection of sensitive organs in non-treated region in body γ-knife treatment |
| Received:January 21, 2016 |
| DOI：10.3760/cma.j.issn.0254-5098.2016.06.012 |
| KeyWords:Body γ-knife Lead shielding Sensitive organs Radiation protection |
| FundProject: |
| Author Name | Affiliation | | Ge Ning | Department of Radiotherapy, Wuhan General Hospital of Guangzhou Command, Wuhan 430070, China | | Han Dongliang | Department of Radiotherapy, Wuhan General Hospital of Guangzhou Command, Wuhan 430070, China | | Yi Fengtao | Department of Radiotherapy, Wuhan General Hospital of Guangzhou Command, Wuhan 430070, China | | Gu Shiyong | Department of Radiotherapy, Wuhan General Hospital of Guangzhou Command, Wuhan 430070, China | | Chen Fuci | Department of Radiotherapy, Wuhan General Hospital of Guangzhou Command, Wuhan 430070, China | | Wang Zhibin | Center for Disease Control & Prevention of Guangzhou Command, Guangzhou 510000, China |
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| Abstract:: |
| Objective To explore the radiation dose from body γ-knife treatment to the non-targeted region's sensitive organs before and after shielding. Methods 20 patients suffering tumors less than 5 cm were selected. Calibrated thermoluminescence dosimeters (TLD) were placed above the sensitive organs, such as lens, thyroid gland and sexual gland, to measure the radiation dose received before shielding. Different plans were prepared for the patients with lung and renicapsule tumors using calibrators of different size. Radiation dose was measured by the aid of water phantom. For selected lung-tumor treatment plan, the radiation doses were measured at the same location on the water phantom shielded with and without 1, 2 and 4 cm lead, respectively. Results The maximum doses were 1 023.3 mGy for lens, 1 235.7 mGy for thyroid gland and 1 176.8 mGy for sexual glands after treatment, respectively, being higher on the left site than the right. The radiation doses to the sensitive organs were higher for the water phatom with more tartgted points, decreasing by 55%-91% after being covered with 1, 2 and 4 cm lead shieldings. There were significant differences in doses received before and after lead shielding (t=14.4, 12.9, 13.3, P<0.05). Conclusions In the course of body γ-knife treatment, the additional factors would increase the dose to the sensitive organs. Therefore, it is necessary to provide lead shielding protection to the teenagers and adults with fertility when they undergo body γ-knife treatment. Trial registration Chinese Clinical Trial Registry, ChiCTR-OOC-16008259. |
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