数字化胸部X射线摄影中铜滤过对受检者辐射剂量的影响

Abstract

Abstract: By using the digital X ray fluoroscopy camera system produced by Siemens, under different additional copper filters (0, 0.1, 0.2, 0.3 mm), chest photography is performed on PMMA phantoms of different thicknesses. Using the contrast-to-noise ratio to evaluate the impact of different additional copper filters on image quality, and using a radiation dosimeter to record the entrance surface dose under different copper filters, in order to explore the effects of additional copper filters on the body surface dose in digital chest X ray photography. The results show that under different additional copper filters, the contrast-to-noise ratio of the image does not change significantly. Under the PMMA phantoms with different thicknesses, the entrance surface dose decreased by 24%-29%, 33%-42% and 39%-47%, after adding 0.1 mm copper, 0.2 mm copper, and 0.3 mm copper respectively, compared with the absence of copper filtration, and the difference was statistically significant (p<0.05). It shows that for the digital chest X ray photography, the appropriate increase of copper filtering will not affect the image quality, but it can effectively reduce the body surface dose.

Key words: Cu filter, digital chest radiography, entrance surface dose, contrast to noise ratio

CLC Number:

R144.1

MIN Gaoyu, LI Xin, ZHAO Feng, HE Wei, HU Yibin. The impact of additional Cu filtration on radiation dose in digital chest radiography[J].RADIATION PROTECTION, 2022, 42(3): 252-256.

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The impact of additional Cu filtration on radiation dose in digital chest radiography

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