全数字大型血管造影机周围辐射剂量的初步研究  

The preliminary study of radiation dose around all-digital large angiographic device

作　　者：黄永[1] 杨忠群[1] 张伟[1] 王伟[1] 孙文省 

机构地区：[1]单县中心医院放射科,山东274300

出　　处：《放射学实践》2011年第5期550-552,共3页Radiologic Practice

摘　　要：目的:通过对全数字大型血管造影机周围X线辐射剂量分布的研究,为介入工作人员科学合理的防护提供依据。方法:利用X线防护监测仪测量照射野周围水平、垂直两个方向的X线强度分布,并测量不同曝光模式下的X线强度,对测量结果进行统计分析。结果:正位时,在水平方向,辐射剂量由照射野向外逐渐衰减;在垂直方向,从地面向上逐渐增高,在130 cm处达到最高,此后逐渐衰减。斜位时,在水平方向,辐射剂量由照射野向外逐渐衰减;在垂直方向,从地面向上逐渐增高,至110 cm处达到最高,此后逐渐衰减。数字减影采集模式辐射剂量最高,心脏采集模式下加装悬挂式铅玻璃防护可减少50%的辐射剂量;透视模式下,15F/S比30F/S辐射剂量低。结论:合理利用各种曝光模式,了解X线辐射剂量在周围的分布情况,可有效减少工作人员接受的辐射剂量。Objective：Through the study about the distribution of radiation dose around all-digital large angiography machine,we can provide scientific and reasonable basis for the intervention staff′s protection.Methods：By using X-ray protection monitor to measure the X-ray intensity distribution around radiation field in both horizontal and vertical direction,and also measure the X-ray′s intensity in different exposure mode,the result was analyzed by using statistic methods.Results：When orthotopic,the radiation dose was gradually attenuated from the radiation field to outside in horizontal direction;And the radiation dose is gradually increased from the ground up to 130cm in vertical direction,then gradually reducted.When oblique,the radiation dose is gradually attenuated from the radiation field to outside in horizontal direction,and the radiation dose is gradually increased from the ground up to 110cm in vertical direction,then gradually reducted.The radiation dose of digital subtraction mode is the highest,50% radiation dose can be reduced when using the suspended lead glass in cardiac mode;Radiation dose of 15F/S will be lower than 30F/S in fluoroscopy mode.Conclusion：The staff can reduce the radiation dose effectively by reasonable using all kinds of exposure modes and learning about the distribution of X-ray′s radiation dose around.

关 键 词：辐射剂量 辐射防护 血管造影术 

分 类 号：R144[医药卫生—公共卫生与预防医学]