| Liu Qitong,Zhang Weiguo,Chen Tong,et al.Influence of different exposure modes on image quality and radiation dose after knee replacement surgery X-ray photography[J].Chinese Journal of Radiological Medicine and Protection,2016,36(7):548-552 |
| Influence of different exposure modes on image quality and radiation dose after knee replacement surgery X-ray photography |
| Received:November 06, 2015 |
| DOI：10.3760/cma.j.issn.0254-5098.2016.07.015 |
| KeyWords:Total knee arthroplasty (TKA) Radiation dose Exposure mode |
| FundProject: |
| Author Name | Affiliation | E-mail | | Liu Qitong | Department of Radiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China | | | Zhang Weiguo | Department of Radiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China | zhangweiguo0906@sina.com | | Chen Tong | Department of Radiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China | | | Jiang Tao | Department of Radiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China | |
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| Abstract:: |
| Objective To study the optimal radiographic conditions for patients with knee arthroplasty (TKA) and the feasibility of clinical application. Methods According to the different exposure modes, including automatic exposure control(AEC) or manual exposure mode (FIXED), the human body specimen was exposed at a certain kV and different mA or mAs. The entrance surface dose (ESD)and dose exposure index(DEI)were recorded, and the subjective image quality was assessed. The test group with optimum parameters obtained with statistical analysis were compared with control group in radiation dose and subjective evaluation. Results In AEC group, ESD and kV showed a negative correlation (r=-0.973, P < 0.05). At the same mA, DEI was firstly decreased and then increased with kV increasing. The subjective image quality score was(1.96±0.56). DEI and physician ratings showed negative correlation (r=-0.840, P < 0.05). In FIXED group, ESD increased with the increasing mAs (r=0.845, P < 0.05). DEI and kV,mAs indicated a positive correlation(r=0.845, P < 0.05). The subjective image quality scores was(4.33±0.79) without correlation with DEI. Compared with the control group, the subjective image quality scores of test group increased, and the radiation dose decreased significantly. Conclusion It is optimal using manual exposure mode with 80 kV/1.25-1 mAs,75 kV/2-1 mAs,70 kV/2.5-1.25 mAs,65 kV/3.2-1.6 mAs and 60 kV/3.2-2 mAs for patients with TKA. |
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