| DING Wen-hong,ZHAN Ling,CHEN Ying,et al.Exploration of the exposal condition of mammography with computed radiology[J].Chinese Journal of Radiological Medicine and Protection,2008,28(4):410-412 |
| Exploration of the exposal condition of mammography with computed radiology |
| Received:April 25, 2008 |
| DOI： |
| KeyWords:Mammography Computed radiology system Radiology screen or film system Image quality Radiation dose |
| FundProject:浙江省医药卫生科技基金资助项目(2004A039) |
| Author Name | Affiliation | | DING Wen-hong | Department of Radiology, Second Affiliated Hospital, College of Medicine of Zhejiang University, Hangzhou 310009, China | | ZHAN Ling | Department of Radiology, Second Affiliated Hospital, College of Medicine of Zhejiang University, Hangzhou 310009, China | | CHEN Ying | Department of Radiology, Second Affiliated Hospital, College of Medicine of Zhejiang University, Hangzhou 310009, China | | 章伟敏 | Department of Radiology, Second Affiliated Hospital, College of Medicine of Zhejiang University, Hangzhou 310009, China |
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| Abstract:: |
| Objective To explore the optimal condition of mammography on computed radiology system (CRS) through comparing the exposal condition of mammography using radiology screen or film system (RSFS) and CRS,as well as the effect of different doses for CRS images.Methods The fluke NA18_220 mammographic phantom were photographed with 26, 28 and 30 kV X_ray in automatic exposure control (AEC) model. And the exposure doses were recorded, the CRS images were processed. Subsequently the same mammographic phantom were photographed with the same kV of X_ray and irradiation field as well as different exposure doses in same model, and the CRS images were processed again. The images of SFS and CRS were read by four independent radiologists under mixed condition. The images of calcification,nylon fibers and masses were assessed by the four experienced readers according to the criterion of American College of Radiology.Results On the AEC model, the exposed dose of CRS was higher than that of RSFS, but the exposure dose lowered to the 1/2_1/3 of the former, the image quality may satisfy the clinical demand, and the exposed dose was lower than SFS.Conclusions The exposed dose may rise distinctly if the image is taken on CRS with no calibration AEC, and the image may satisfy the clinical demand with lower exposed dose than RSFS. So how to use CRS reasonably plays a key role in mammography. |
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