基于中国儿童参考体模的X射线摄影剂量评估

目的:建立中国儿童面元参考体模，并将其应用于儿童X射线摄影的剂量评估中。方法:基于不同年龄儿童的CT原始数据，经过器官勾画、器官调整优化等过程建立起5和10岁的中国儿童面元参考体模。基于上述体模，利用蒙特卡罗方法，对X射线摄影进行建模，计算不同照射条件下儿童受检者器官剂量转换系数及有效剂量转换系数。结果:建立的5和10...

Dose estimation of X-ray radiography based on Chinese pediatric reference phantoms

Objective The Chinese pediatric mesh-type reference phantoms were developed and applied in the dose assessment of X-ray radiography. Methods The 5- and 10-year-old Chinese pediatric mesh-type reference phantoms were developed based on the CT data. Based on the phantoms, the Monte Carlo method was applied to simulate the X-ray radiography to calculate the organ dose conversion coefficient and the effective dose conversion coefficient in different radiography conditions. Results The 5- and 10-year-old Chinese pediatric mesh-type reference phantoms were developed, and the physical parameters were consistent with the national standard. The differences of the organ mass between the established phantoms and reference data were within 2%. The database of the pediatric chest posteroanterior projection and abdominal anteroposterior projection,tube voltage 60-90 kVp, total filtration 2.5~4 mmAl were simulated, and the difference between the effective dose conversion factor and the literature result was within 3%. Conclusions The established Chinese pediatric mesh-type reference phantoms can be applied in the studies of radiation protection and clinical medicine and their result can provide an important reference for the dose assessment of the pediatric X-ray radiography.