Abstract：Objective To ensure image quality and reduce radiation dose to a lower level on the premise of meeting the diagnosis by
optimizing the exposure parameters of the orthographic transmission target tube of the wrist in children’s bone age DR examination.
Methods The X-ray machine was moved by the transmission target tube, using the acrylic plate and the aged children’s wrist bare
bone as the subjects. The photography distance was fixed at 70 cm, and tube voltage and tube current were changed respectively for
exposure. Monitoring the radiation dose, and record the actual exposure parameters and radiation dose values during each exposure.
According to the best, good and bad selection of the obtained image, the exposure parameters corresponding to the selected highquality
image were selected as the selection target, and the ideal exposure parameter range was established by comparing the
measured radiation dose value, and then the clinical verification was carried out. Results Under the same tube voltage, the image
quality was significantly different with different tube current (P=0.015). Under the same tube current, there was no significant
difference in image quality between different tube voltages (P=0.525). The image quality was excellent when the exposure parameters
were selected in the range of 70~75 kV, 0.15~0.25 mAs. The detected skin incident dose was in the range of 7.127~13.77 μGy (average
10.301 μGy). Conclusion Using the DR system for children’s wrist photography, the exposure parameters of 75 kV, 0.15~0.25 mAs,
can obtain satisfactory images, and the entrance surface dose is below 13.77 μGy.
赵英威，倪晓龙，王文海，程晓光. 儿童骨龄DR检查手腕部正位透射靶球管曝光参数优化选择[J]. 中国医疗设备, 2021, 36(8): 67-70.
ZHAO Yingwei, NI Xiaolong, WANG Wenhai, CHENG Xiaoguang. Optimization of Exposure Parameters of Penetrating Tube for Wrist Anteroposterior Film in
Children Bone Age DR Examination. China Medical Devices, 2021, 36(8): 67-70.
