摘要
SPECT骨扫描需要患者注射含99mTc的放射性药物,患者在注射后3 h内采取设立单独SPECT候诊室的隔离的方式来保护公众的安全,但患者在出院后会对未采取防护措施的周围公众一定的辐射影响,这样有必要对患者出院后公众受照有效剂量进行估算.对公众受照有效剂量的估算使用451P型辐射剂量仪测量患者出院时的空气吸收剂量率,再根据Mountford法对公众受照有效剂量进行估算,其估算结果要满足国家相应辐射安全标准.经Mountford法估算,与注射99mTc患者接触的公众受照有效剂量均符合国家限值要求.
SPECT bone scanning requires patients with injection of 99m Tc radioactive drug. Patients stayed in SPECT drawing room for three hours after injection to protect the public safety. But discharged patients could bring radiation impact to public if there was no pro_tection measures. So it’s necessary to estimate the radiation effective dose of public. 451P radiation dosimeter was used to measure external air absorption dose rate for discharged pa_tients. Then Mountford method to estimate the radiation effective dose of public. The esti_mation result must meet the national radiation safety standards. Through estimating radia_tion effective dose of public by discharged patients with injection of 99mTc,the result meet national standard limit value.
出处
《南华大学学报（自然科学版）》
2014年第4期14-17,50,共5页
Journal of University of South China：Science and Technology
基金
环保部公益基金资助项目(JG201113)
