Our study aims to determine diagnostic reference levels (DRL) for chest front examination in postero anterior (PA) for optimizing patient entrance surface dose (ESD) and dose-area product (DAP) of patients in west of ...Our study aims to determine diagnostic reference levels (DRL) for chest front examination in postero anterior (PA) for optimizing patient entrance surface dose (ESD) and dose-area product (DAP) of patients in west of Côte d’Ivoire. 90 patients from three hospitals undergoing conventional radiology were considered. The ESD and DAP for each patient were obtained during chest radiography (PA) examination. The measurements were performed with the device call Dose-Area Product-meter (DAP-meter) with brand Diamentor M4-KDK, type 11017. The DRL were obtained in applying the 75th percentile statistical method to the obtained ESD and DAP. The obtained DRL in ESD for chest radiography for all rooms is 0.40 mGy and in DAP is 54.85 cGy·cm2. Our DRL for ESD is higher than those obtained in Abidjan District and in other countries like UK and Cameroon. Our DRL for DAP is higher than those from Abidjan and all other countries for which a similar study was made. The comparison of these values to those from Abidjan and other countries, shows us that radiology technicians can make efforts to choose radiological parameters to reduce ESD. They must use convenable the X-rays tube to reduce DAP by reducing the patient exposure surface.展开更多
目的:比较冠状动脉造影不同体位的辐射剂量。方法:采用PHILIP Allura Xper FD 20进行冠状动脉造影患者77例。分别选择头位30o、足位30o、右肩位、左肩位、肝位、蜘蛛位进行左冠状动脉造影;选择左前斜45o和头倾30o进行右冠状动脉造影。...目的:比较冠状动脉造影不同体位的辐射剂量。方法:采用PHILIP Allura Xper FD 20进行冠状动脉造影患者77例。分别选择头位30o、足位30o、右肩位、左肩位、肝位、蜘蛛位进行左冠状动脉造影;选择左前斜45o和头倾30o进行右冠状动脉造影。记录每位患者总的透视时间(FT)、累积剂量(CD)和剂量面积乘积(DAP)以及每个体位的投照角度、采集图像总数、管电压、管电流和DAP值,计算不同体位单帧图像的DAP值并进行比较。结果:77例患者平均FT、CD和DAP值分别为216.56±115.52s、281.28.±126.28mGy和34114.74±16587.81 mGy.cm^2。左冠状动脉造影6个体位中,左前斜位的DAP值显著高于头足位和右前斜位,差异具有统计学意义(P值均<0.05);头足方向即左肩位和蜘蛛位、头位和足位、右肩位和肝位之间的DAP值差异均没有统计学意义(P值均>0.05)。结论:冠状动脉造影不同投照体位对辐射剂量有影响;球管左右方向倾斜对辐射剂量影响较大,球管头足方向倾斜对辐射剂量影响不明显;利用单帧图像的DAP值进行辐射剂量对比研究,方法简单,易于推广。展开更多
文摘Our study aims to determine diagnostic reference levels (DRL) for chest front examination in postero anterior (PA) for optimizing patient entrance surface dose (ESD) and dose-area product (DAP) of patients in west of Côte d’Ivoire. 90 patients from three hospitals undergoing conventional radiology were considered. The ESD and DAP for each patient were obtained during chest radiography (PA) examination. The measurements were performed with the device call Dose-Area Product-meter (DAP-meter) with brand Diamentor M4-KDK, type 11017. The DRL were obtained in applying the 75th percentile statistical method to the obtained ESD and DAP. The obtained DRL in ESD for chest radiography for all rooms is 0.40 mGy and in DAP is 54.85 cGy·cm2. Our DRL for ESD is higher than those obtained in Abidjan District and in other countries like UK and Cameroon. Our DRL for DAP is higher than those from Abidjan and all other countries for which a similar study was made. The comparison of these values to those from Abidjan and other countries, shows us that radiology technicians can make efforts to choose radiological parameters to reduce ESD. They must use convenable the X-rays tube to reduce DAP by reducing the patient exposure surface.
