ABSTRACT
Objective Exploration of the application value of the third-generation dual source CT low tube voltage (70 kVp) scanning combined with advanced modeling iterative reconstruction (ADMIRE) technique in children with adenoid examination. Methods CT scans were performed in patients with clinically suspected adenoid hypertrophy. They were divided into two groups according to the time of treatment. Group A (40 cases) : low tube voltage (70 kVp) scan, reference tube current 163 mAs, reconstruction with ADMIER, Intensity 3; Group B (40 cases) : conventional 100 kVp, reference tube current 163 mAs, conventional (filtered back-projection, FBP) reconstruction;rest of the scanning parameters remained unchanged. The subjective scores and objective quality indicators of the images (CT value, image noise, signal noise ratio (SNR) , contrast noise ratio (CNR)) and radiation dose of the two groups were compared. Results The difference of radiation dose between group A and group B was statistically significant (P < 0.05). The radiation dose of group A was lower than that of group B by 77.58％.Compared with group B, the image noise of group A increased by 0.002％; the SNR decreased by 0.01％; CNR increased by 0.03％; there was no significant difference in objective quality evaluation index and subjective score between two groups in the image quality (P> 0.05). Conclusion The third-generation dual-source CT low-tube voltage (70 kVp) combined with ADMIRE reconstruction technique for children with adenoid scan can effectively reduce the radiation dose while ensuring image quality.
ABSTRACT
Objective]To summarize and clarify the view on Yin and Yang of Zheng Qin-An ,in order to deepen the study on fire-spirit school. [Method]Read the related works of Chen Xiu-Yuan, Liu Yuan, Zheng Qin ’An, Lu ZhuZhi, etc, as wel as related research papers of modern researchers. Then we summarize the view on Yin and Yang of Zheng Qin-An, as wel as it ’s resources and evolution. [Result] Zheng Qin-An advocated the balance of Yin and Yang, didn’t admire Yang and despise Yin. He also had no preference on Yang aided medicine. Zheng Qin-An ’s view on Yin and Yang mainly was affected by Liu Yuan, and significantly different from Chen Xiu-Yuan. Lu Zhu-Zhi inherited the academic point of view of Zheng Qin-An and made some significant changes. After that, fire-spirit school only emphasized the importance of Yang Qi. Developed to the extreme, some fire-spirit school scholars held that al patients were Yang deficiency and al prescriptions should aid Yang Qi. These views had deviated significantly from its founding fathers. [Conclusion]Zheng Qin-An advocated the balance of Yin and Yang, but his successor ’s only emphasis on the importance of Yang Qi, was contrary to the original intention of Zheng Qin-An.