中华放射医学与防护杂志
中華放射醫學與防護雜誌
중화방사의학여방호잡지
Chinese Journal of Radiological Medicine and Protection
2013年
1期
68-71
,共4页
李鹏%高林峰%卓维海%陈波
李鵬%高林峰%卓維海%陳波
리붕%고림봉%탁유해%진파
医疗照射%胸部X射线摄影%后前位%入射体表剂量%诊断参考水平
醫療照射%胸部X射線攝影%後前位%入射體錶劑量%診斷參攷水平
의료조사%흉부X사선섭영%후전위%입사체표제량%진단삼고수평
Medical exposure%Chest X-ray photography%Posteroanterior%Entrance surface dose%Diagnostic reference level
目的 掌握上海市成年人胸部后前位(正位)X射线摄影的剂量水平现状,分析影响剂量水平的主要因素.方法 用热释光剂量元件测量照射野中心的最大剂量(入射体表剂量).根据普通X射线机、计算机摄影设备CR和数字摄影设备DR 3大类设备数量及其在各级医院分布的比例,共测量1032名成年人在接受胸部正位X射线摄影时的入射体表剂量,并记录相应的主要摄影参数及相关信息.分析入射体表剂量均值与医院等级、设备类型以及主要摄影参数的差异情况.结果 上海市成年人胸部正位X射线摄影的入射体表剂量算术均值为0.23 mGy,其第75百分位数为0.28 mGy,小于我国目前推荐的诊断参考水平0.40 mGy.入射体表剂量均值与医院等级、设备类型以及常用摄影参数等显著相关.结论 与20世纪末相比,上海市成年人胸部正位X射线摄影的入射体表剂量水平下降明显,并存在可进一步下降的条件.
目的 掌握上海市成年人胸部後前位(正位)X射線攝影的劑量水平現狀,分析影響劑量水平的主要因素.方法 用熱釋光劑量元件測量照射野中心的最大劑量(入射體錶劑量).根據普通X射線機、計算機攝影設備CR和數字攝影設備DR 3大類設備數量及其在各級醫院分佈的比例,共測量1032名成年人在接受胸部正位X射線攝影時的入射體錶劑量,併記錄相應的主要攝影參數及相關信息.分析入射體錶劑量均值與醫院等級、設備類型以及主要攝影參數的差異情況.結果 上海市成年人胸部正位X射線攝影的入射體錶劑量算術均值為0.23 mGy,其第75百分位數為0.28 mGy,小于我國目前推薦的診斷參攷水平0.40 mGy.入射體錶劑量均值與醫院等級、設備類型以及常用攝影參數等顯著相關.結論 與20世紀末相比,上海市成年人胸部正位X射線攝影的入射體錶劑量水平下降明顯,併存在可進一步下降的條件.
목적 장악상해시성년인흉부후전위(정위)X사선섭영적제량수평현상,분석영향제량수평적주요인소.방법 용열석광제량원건측량조사야중심적최대제량(입사체표제량).근거보통X사선궤、계산궤섭영설비CR화수자섭영설비DR 3대류설비수량급기재각급의원분포적비례,공측량1032명성년인재접수흉부정위X사선섭영시적입사체표제량,병기록상응적주요섭영삼수급상관신식.분석입사체표제량균치여의원등급、설비류형이급주요섭영삼수적차이정황.결과 상해시성년인흉부정위X사선섭영적입사체표제량산술균치위0.23 mGy,기제75백분위수위0.28 mGy,소우아국목전추천적진단삼고수평0.40 mGy.입사체표제량균치여의원등급、설비류형이급상용섭영삼수등현저상관.결론 여20세기말상비,상해시성년인흉부정위X사선섭영적입사체표제량수평하강명현,병존재가진일보하강적조건.
Objective To survey the current dose level for adults undergoing posteroanterior (PA) chest X-ray photography in Shanghai,and to analyze the main factors affecting the dose level.Methods The thermoluminescence dosimeters (TLDs) were deployed to measure entrance surface dose (ESD) in the center of radiated fields.According to the numbers of three types of X-ray equipment and their distribution among different grade hospitals in Shanghai,the ESDs were surveyed for 1032 adults undergoing examination of PA chest X-ray photography from 2008 to 2010,and the relevant information was also recorded.The differences of the mean ESDs among different grade hospitals,equipment types and photographic parameters were statistically analyzed.Results The arithmetic mean of the ESDs for adults undergoing examination of PA chest X-ray photography in Shanghai was 0.23 mGy,and the 75th percentile value was 0.29 mGy,which were all below the current China diagnostic reference level (0.40 mGy).The averaged ESDs were significantly correlated with the grade of hospital,the equipment types and the photographic parameters.Conclusions Compared with the value in the last century,the ESD for adults undergoing PA chest X-ray photography in Shanghai obviously decreases,and there are the potentials for further reduction.
