CAJ | 학술논문

目的：建立新型Perfexion型γ刀剂量学指标测试方法，评价其应用于质量控制的可行性。方法：依据国家卫生和行业标准的推荐方法，对Perfexion型γ刀的焦斑偏差、中心剂量率、照射野输出因子、射野尺寸、射野半影及剂量偏差等剂量学指标进行检测，并将检测结果与厂商工程师验收测试的结果进行比较。结果：该γ刀的焦斑偏差为0.42 mm，3种准直器的中心剂量率均＞2.5 Gy/min，照射野输出因子均＞0.8，射野尺寸或射野半影与厂商标称值最大偏差分别为1.3 mm和1.5 mm，实际剂量与计划剂量相对偏差为2.6%。结论：建立起的Perfexion型γ刀剂量学检测方法具有良好的适用性，为γ刀的质量控制检测奠定了基础。
목적：건립신형Perfexion형γ도제량학지표측시방법，평개기응용우질량공제적가행성。방법：의거국가위생화행업표준적추천방법，대Perfexion형γ도적초반편차、중심제량솔、조사야수출인자、사야척촌、사야반영급제량편차등제량학지표진행검측，병장검측결과여엄상공정사험수측시적결과진행비교。결과：해γ도적초반편차위0.42 mm，3충준직기적중심제량솔균＞2.5 Gy/min，조사야수출인자균＞0.8，사야척촌혹사야반영여엄상표칭치최대편차분별위1.3 mm화1.5 mm，실제제량여계화제량상대편차위2.6%。결론：건립기적Perfexion형γ도제량학검측방법구유량호적괄용성，위γ도적질량공제검측전정료기출。
Objective:To establish a new type of Perfexion gamma knife dosimetry indicators testing methods, and evaluate the feasibility of its application in quality control.Methods:According to recommendations of national health standards, including irradiation focal spot deviation, central dose rate deviation, the radiation field output factor, the field size of the beam, beam penumbra and dose deviation dosimetry indicators of same tests were implemented. The test results were compared with the results of manufacturer engineer test.Results:The focal spot deviation is 0.42mm, the center dose rate of the three kinds of collimator is>2.5Gy/min, the radiation field output factor is>0.8, the maximum deviations between beam size or beam penumbra and factory nominal value were 1.3mm and 1.5mm respectively, and the deviation between the actual dose and planning dose is 2.6%.Conclusion:The established methods were efficient applied in gamma knife tests and lay down solid foundation experiment for quality control.