口腔数字化曲面断层机与普通曲面断层机受照剂量对比研究  

Comparitive study of radiation dose between digital panoramic X-ray unit and general panoramic X-ray unit

作　　者：李青山[1] 段涛[1] 王晓筠[1] 赵力[2] 魏磊[3] 董建[2] 

机构地区：[1]吉林大学口腔医院放射科,吉林长春130021 [2]吉林大学公共卫生学院放射医学教学实验中心,吉林长春130021 [3]中国人民解放军空军航空大学医院门诊部,吉林长春130022

出　　处：《吉林大学学报（医学版）》2010年第6期1158-1160,共3页Journal of Jilin University：Medicine Edition

基　　金：国家自然科学基金资助课题(30471893)

摘　　要：目的:比较使用普通曲面断层机及数字化曲面断层机完成同样医疗任务的情况下的患者实际受照剂量,为临床选择口腔X线检查方法提供依据。方法:将50个圆片状氟化锂热释光剂量计(简称剂量计)平均分成5组:第1组剂量计放于医生办公室,作为天然本底对照组,其余4组剂量计分别按照临床普通曲面断层机和数字化曲面断层机对儿童及成人的口腔疾病进行照射的条件照射,照射后用热释光剂量仪对以上各组剂量计计数,计算出受照剂量,并进行统计学分析。结果:儿童和成人使用普通曲面断层机的受照剂量分别为(0.61±0.9)mSv和(1.72±0.2)mSv,分别是使用数字化曲面断层机的1.39倍(t=6.904,P<0.01)和1.55倍(t=-11.514,P<0.01),组间比较差异有显著性。结论:使用数字化曲面断层设备受照剂量明显低于普通曲面断层设备,值得在临床上推广应用。Objective To compare the actual dose of patients who receive the same medical practice by either digital panoramic X-ray unit and general panoramic X-ray unit and give evidence for better selection of oral X-ray examination method.Methods Round sheet lithium fluoride （LiF）thermoluminescent dosimeters （TLD）were used.The experiment was divided into natural background contrast group,general panoramic X-ray children group,general panoramic X-ray adults group,digital panoramic X-ray children group and digital panoramic X-ray adults group.The dosimeter of natural background radiation was placed at the office of the doctor,the dosimeters of general panoramic X-ray children group and general panoramic X-ray adults group were irradiated by different conditions according to the clinical application of panoramic X-ray to children and adults,the dosimeters of digital panoramic X-ray children group and digital panoramic X-ray adults group were irradiated by different conditions according to the clinical application of digital panoramic X-ray to children and adults.The thermoluminescent dosimeter was used to count and calculate the exposure doses in various groups.Results The dose of children exposed in general panoramic X-ray unit was 1.28times of that in digital panoramic X-ray unit,there was significant difference （t=6.904,P0.01）.The dose of adults exposed in general panoramic X-ray unitwas1.55times of that in the digital panoramic X-ray unit,there also was significant difference （t=-11.514.P 0.01）.Conclusion The digital panoramic X-ray unit can reduce the dose of patients,so the digital panoramic X-ray unit should be used as far as possible.

关 键 词：氟化锂热释光剂量计 热释光剂量仪 普通曲面断层机 数字化曲面断层机 辐射剂量 

分 类 号：R816.98[医药卫生—放射医学]