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目的:评估全身骨显像患者注射显像剂后对医院人群的辐射安全影响。方法:全身骨显像患者50例注射骨显像剂~(99m)Tc-亚甲基二膦酸盐(~(99m)Tc-MDP)922MBq后0.5小时、1小时、2小时和4小时,使用剂量测量仪距离患者0.5米、1米、2米分别测量头部、腹部辐射剂量值。结果:平均辐射剂量值(μSv/h)在注射显像剂0.5小时后距离0.5米处最高,其中头部(37.69±0.67)μSv/h、腹部(43.40±0.78)μSv/h。在距离一定时,注射后0.5小时较1小时、2小时、4小时平均辐射剂量值高,差异有统计学意义(P<0.05)。在时间一定时,距离患者0.5米处测量平均辐射剂量值较距离1米、2米处高,差异有统计学意义(P<0.05)。随时间、距离增加,测量值迅速降低。结论:全身骨显像患者对医院人群的辐射测量值在相对安全范围以内(≤20mSv,职业工作人员的年当量剂量)。
OBJECTIVE: To assess the radiation safety of hospitalized patients after injection of imaging agent in patients with whole-body bone scintigraphy. METHODS: Twenty-five hours, one hour, two hours and four hours after the injection of 922 MBq of bone imaging agent 99m Tc-methylene diphosphonate (~ (99m) Tc-MDP) The use of dose measuring instrument from the patient 0.5 meters, 1 meter, 2 meters were measured head and abdomen radiation dose values. Results: The mean radiation dose (μSv / h) was the highest at 0.5 m after injection of imaging agent 0.5 h, with 37.69 ± 0.67 μSv / h in the head and 43.40 ± 0.78 μSv / h in the abdomen. At a certain distance, the mean radiation dose at 0.5h, 1h, 2h and 4h after injection was significantly higher (P <0.05). At a certain time, the mean radiation dose measured at a distance of 0.5 m from the patient was higher than that at a distance of 1 m and 2 m, with a significant difference (P <0.05). Over time, the distance increases and the measurement decreases rapidly. CONCLUSIONS: Radiographic measurements of whole body bone imaging patients within the hospital population are within a relative safe range (≤20 mSv, annual equivalent dose of occupational staff).