Study of Full-Field Digital Mammography Reduced Radiation Dose
CHEN Jinliang1, YUAN Hua1, FENG Jiannan1, SUN Hao1, XIE ChangJun2
1. Department of Radiology, Benxi Steel (Group) General Hospital, Benxi Liaoning 117000, China;
2. Radiological Health Supervision Institute, Benxi Disease Prevention And Control Center, Benxi Liaoning 117000, China
Abstract：Objective Under the premise of not affecting the image quality, the exposure condition of decreasing radiation dose and
the optimal target/filter combination condition in digital mammography were discussed in this paper. Methods Soft tissue equivalent
plates were combined to simulate mammary glands of different thickness. Three different target/filter combinations were used for
exposure, and exposure conditions and radiation dose were recorded respectively. The mammary gland model was exposed, kV and
mAs values were obtained, and the average dose values of glands were recorded respectively. Using the same conditions of film
viewing on the workstation, the image quality of simulated fibrous tissue, simulated calcification group and simulated mass in the
body model image were evaluated by 3 medium-to-high imaging diagnostic doctors respectively. Results The Organ.Dose values
generated by the three target filtration combinations for different mold thickness were in line with the normal distribution. Organ.
Dose differences among the three target filtration combinations were statistically significant (F=34.78, P<0.01). The differences
in Organ.Dose generated by different thickness modules were also statistically significant (F=41.32, P<0.01). According to the
exposure parameters of the model body in the automatic exposure mode, there was no statistically significant difference in the scores
of fiber, calcification and tumor of the three simulated breast tissues (P>0.05) when fixed tube voltage and changed tube current were
exposed. There was no statistically significant difference in the scores of fiber, calcification and tumor of the three simulated breast
tissues (P>0.05) after exposure by fixing the tube current and changing the tube voltage. Conclusion RW/Rh filtration is applied in
digital mammography, and the radiation dose of mammography can be effectively reduced by appropriately reducing the tube voltage
and current flow on the basis of automatic exposure.
陈进良1，袁华1，冯剑楠1，孙皓1，谢长军2. 全数字化乳腺摄影降低辐射剂量的探讨[J]. 中国医疗设备, 2019, 34(2): 85-88.
CHEN Jinliang1, YUAN Hua1, FENG Jiannan1, SUN Hao1, XIE ChangJun2. Study of Full-Field Digital Mammography Reduced Radiation Dose. China Medical Devices, 2019, 34(2): 85-88.
