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http://dx.doi.org/10.3348/kjr.2013.14.1.126

Optimizing Imaging Quality and Radiation Dose by the Age-Dependent Setting of Tube Voltage in Pediatric Chest Digital Radiography  

Guo, Hui (Xinjiang Medical University, Affiliated Hospital 1, Medical Imaging Research Center)
Liu, Wen-Ya (Xinjiang Medical University, Affiliated Hospital 1, Medical Imaging Research Center)
He, Xiao-Ye (Xinjiang Medical University, Affiliated Hospital 1, Medical Imaging Research Center)
Zhou, Xiao-Shan (Xinjiang Medical University, Affiliated Hospital 1, Medical Imaging Research Center)
Zeng, Qun-Li (Xinjiang Medical University, Affiliated Hospital 1, Medical Imaging Research Center)
Li, Bai-Yan (Xinjiang Medical University, Affiliated Hospital 1, Medical Imaging Research Center)
Publication Information
Korean Journal of Radiology / v.14, no.1, 2013 , pp. 126-131 More about this Journal
Abstract
Objective: The quality and radiation dose of different tube voltage sets for chest digital radiography (DR) were compared in a series of pediatric age groups. Materials and Methods: Forty-five hundred children aged 0-14 years (yr) were randomly divided into four groups according to the tube voltage protocols for chest DR: lower kilovoltage potential (kVp) (A), intermediate kVp (B), and higher kVp (C) groups, and the fixed high kVp group (controls). The results were analyzed among five different age groups (0-1 yr, 1-3 yr, 3-7 yr, 7-11 yr and 11-14 yr). The dose area product (DAP) and visual grading analysis score (VGAS) were determined and compared by using one-way analysis of variance. Results: The mean DAP of protocol C was significantly lower as compared with protocols A, B and controls (p < 0.05). DAP was higher in protocol A than the controls (p <0.001), but it was not statistically significantly different between B and the controls (p = 0.976). Mean VGAS was lower in the controls than all three protocols (p < 0.001 for all). Mean VGAS did not differ between protocols A and B (p = 0.334), but was lower in protocol C than A (p = 0.008) and B (p = 0.049). Conclusion: Protocol C (higher kVp) may help optimize the trade-off between radiation dose and image quality, and it may be acceptable for use in a pediatric age group from these results.
Keywords
Digital radiography; Children; Chest; Dose area product; Visual grading analysis score;
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