Aim: Lead aprons are used to protect against scattered radiation from the patient during interventional procedures and certain special conventional radiological examinations. Given the importance of the role lead apro...Aim: Lead aprons are used to protect against scattered radiation from the patient during interventional procedures and certain special conventional radiological examinations. Given the importance of the role lead aprons are supposed to play in radiation protection, we propose to assess their conformity in medical imaging departments in public and religious hospitals in Togo. Materials and method: A multi-centre survey conducted from 26 November to 06 December 2021 in the radiology departments of public and religious health facilities in Togo. All aprons in use were included. The evaluation criteria were physical (visual), quantitative (radiographic) and qualitative (dosimetric). Results: We had registred 43 aprons among wich 27 (62.79%) leaded aprons were labelled non-compliant and 16 (37.21%) were labelled compliant. Of the aprons judged to be non-compliant, 70.37% were more than 10 years old and 96.30% showed defects on the radiographic images. The most common defects were vampire marks (18.64%), multiple folds (16.96%), cracks (16.96%), multiple cracks (15.25%), tears (8.47%), absence of lead (5.08%), holes (3.39%) and lead corrosion (1.69%). Defective aprons (62.96%) had at least two defects. The defects were of thoraco-abdomino-pelvic (74.07%), thoracic (14.82%) and abdomino-pelvic (11.11%) topography. For indirect exposure at 50 and 70 kilovolts, all the aprons had an attenuation factor greater than 90%. After dosimetric measurement, 13.95% of aprons had attenuation factors below 90% for indirect exposure at 100 kilovolts. Conclusion: The compliance of the leaded decks is trifactorial (physical, radiographic and dosimetric). However, there is no significant difference in X-ray attenuation capacity between defective and normal decks.展开更多
目的分析武汉市内17家医疗机构的2009-2016年介入放射工作人员个人剂量水平及其动态变化情况,为保障介入人员的身体健康、卫生行政部门的放射管理工作提供可靠依据。方法采用热释光法进行监测,基于国家相关法律法规及卫生标准进行评价...目的分析武汉市内17家医疗机构的2009-2016年介入放射工作人员个人剂量水平及其动态变化情况,为保障介入人员的身体健康、卫生行政部门的放射管理工作提供可靠依据。方法采用热释光法进行监测,基于国家相关法律法规及卫生标准进行评价。结果介入工作人员佩戴个人剂量计的数量逐年增多,8年的人均年剂量当量为0.97 m Sv,并呈逐年下降趋势;从大剂量值的构成比来看,2009年最多,为27.9%;2014年最少,为3.52%,总体呈现下降趋势。结论武汉市介入放射工作人员的受照剂量较低且逐年下降,总体满足国家职业接触限值的要求。介入人员的防护意识逐步提高,但介入人员手部外照射量值得我们关注。展开更多
文摘Aim: Lead aprons are used to protect against scattered radiation from the patient during interventional procedures and certain special conventional radiological examinations. Given the importance of the role lead aprons are supposed to play in radiation protection, we propose to assess their conformity in medical imaging departments in public and religious hospitals in Togo. Materials and method: A multi-centre survey conducted from 26 November to 06 December 2021 in the radiology departments of public and religious health facilities in Togo. All aprons in use were included. The evaluation criteria were physical (visual), quantitative (radiographic) and qualitative (dosimetric). Results: We had registred 43 aprons among wich 27 (62.79%) leaded aprons were labelled non-compliant and 16 (37.21%) were labelled compliant. Of the aprons judged to be non-compliant, 70.37% were more than 10 years old and 96.30% showed defects on the radiographic images. The most common defects were vampire marks (18.64%), multiple folds (16.96%), cracks (16.96%), multiple cracks (15.25%), tears (8.47%), absence of lead (5.08%), holes (3.39%) and lead corrosion (1.69%). Defective aprons (62.96%) had at least two defects. The defects were of thoraco-abdomino-pelvic (74.07%), thoracic (14.82%) and abdomino-pelvic (11.11%) topography. For indirect exposure at 50 and 70 kilovolts, all the aprons had an attenuation factor greater than 90%. After dosimetric measurement, 13.95% of aprons had attenuation factors below 90% for indirect exposure at 100 kilovolts. Conclusion: The compliance of the leaded decks is trifactorial (physical, radiographic and dosimetric). However, there is no significant difference in X-ray attenuation capacity between defective and normal decks.
文摘目的分析武汉市内17家医疗机构的2009-2016年介入放射工作人员个人剂量水平及其动态变化情况,为保障介入人员的身体健康、卫生行政部门的放射管理工作提供可靠依据。方法采用热释光法进行监测,基于国家相关法律法规及卫生标准进行评价。结果介入工作人员佩戴个人剂量计的数量逐年增多,8年的人均年剂量当量为0.97 m Sv,并呈逐年下降趋势;从大剂量值的构成比来看,2009年最多,为27.9%;2014年最少,为3.52%,总体呈现下降趋势。结论武汉市介入放射工作人员的受照剂量较低且逐年下降,总体满足国家职业接触限值的要求。介入人员的防护意识逐步提高,但介入人员手部外照射量值得我们关注。
