Abstract：Objective To explore the effect of different filter on digital image quality and radiation dose. Methods Under the different filter by 1 mmAl, 1.5 mmAl, 2 mmAl, 2.5 mmAl, 3 mmAl, 1 mmAl+1 mmCu, 1.5 mmAl+1 mmCu, 2 mmAl+1 mmCu, 2.5 mmAl+1 mmCu, 3 mmAl+1 mmCu, 70 kV, 90 kV, 110 kV and 130 kV were exposed respectively. Having a 8 cm organic glass simulating average thickness of adult pulmonary tissue, effect of different filter on mAs, image quality and radiation dose could be observed through image quality evaluated by CDRAD2.0 phantom and radiation dose detected by dose-area product meter. Results Under the automatic exposure mode, with the thicker or higher Z filtration, mAs increased significantly, while radiation dose decreased obviously. Under the exposure of 70 kV and 90 kV, the different filter had evident effects on the image quality, but not under 130 kV. Conclusion Under the premise of calculated image quality and equipment not overload, the appropriate thicker and higher Z filtration can reduce radiation dose.
曲良勇，苑翠红. 滤过对数字化胸部X射线摄影图像质量和辐射剂量的影响[J]. 中国医疗设备, 2014, 29(2): 44-46.
QU Liang-yong, YUAN Cui-hong. Effect of Filter on Image Quality of Digital Chest Radiography and Radiation Dose. China Medical Devices, 2014, 29(2): 44-46.
