CAJ | 학술논문

目的对影响数字乳腺X线摄影辐射剂量的不同靶面/滤过组合以及不同曝光模式进行研究.方法采用西门子MAMMOMAT NovationDR型数字乳腺摄影机,应用不同靶面/滤过组合和不同曝光模式对乳腺体模和X射线用矩形波测试卡进行照射,记录其辐射剂量并观察测试卡显示的线对数,再对临床病例进行对比研究,记录其辐射剂量并观察照片质量有无差别.结果同等X线片质量下,三种不同靶面/滤过组合和两种不同曝光模式的辐射剂量差别较大,在体模试验中,钼靶/钼滤过组合达到2.2 mGy,钼靶/铑滤过组合达到1.5 mGy,而钨靶/铑滤过组合最小,只有1.0mGy；与自动曝光模式的辐射剂量3.0 mGy相比,手动曝光控制模式的辐射剂量可下降到1.5mGy.同时,临床病例测试结果与体模测试结果完全相符.结论在实际工作中,应尽量选择手动曝光控制模式和钨靶/铑滤过组合进行摄影,以尽量减少患者的辐射剂量.
목적 대영향수자유선X선섭영복사제량적불동파면/려과조합이급불동폭광모식진행연구.방법 채용서문자MAMMOMAT NovationDR형수자유선섭영궤,응용불동파면/려과조합화불동폭광모식대유선체모화X사선용구형파측시잡진행조사,기록기복사제량병관찰측시잡현시적선대수,재대림상병례진행대비연구,기록기복사제량병관찰조편질량유무차별.결과 동등X선편질량하,삼충불동파면/려과조합화량충불동폭광모식적복사제량차별교대,재체모시험중,목파/목려과조합체도2.2 mGy,목파/로려과조합체도1.5 mGy,이오파/로려과조합최소,지유1.0mGy；여자동폭광모식적복사제량3.0 mGy상비,수동폭광공제모식적복사제량가하강도1.5mGy.동시,림상병례측시결과여체모측시결과완전상부.결론 재실제공작중,응진량선택수동폭광공제모식화오파/로려과조합진행섭영,이진량감소환자적복사제량.
Objective To study different target surface/filtration combination and exposure modes which are influence factors to digital mammography radiation dose.Methods Phantom of breast and rectangular wave test card were exposed to Siemens MAMMOMAT NovationDR digital breast X-ray machine by different target surface/filtration combines and different exposure modes,radiation dose and line logarithms of test card was obtained.And then comparatively studied with clinical radiation does,observed the different quality of images.Results There are significant difference between three different target surface/filtration combines and two different exposure modes at the same X-ray image quality.The radiation dose of target surface/ filtration combinations of molybdenum/molybdenum,molybdenum/rhodium,and tungsten/rhodium were 2.2 mGy,1.5 mGy,and 1.0 mGy in model test,respectively.Compared with 3 mGy of automatic exposure,manual exposure dose decreased to 1.5 mCy.The results of clinical case and model test were completely conformed.Conclusion Manual exposure mode and tungsten/rhodium target suface/filtration combination were advised to reduce the radiation dose in clinical application