A new cinema documentary history is being written because of the new film watching experience,consumer pleasure,and aesthetic harvests achieved by the quality reconstruction of the world cinema documentaries. In this ...A new cinema documentary history is being written because of the new film watching experience,consumer pleasure,and aesthetic harvests achieved by the quality reconstruction of the world cinema documentaries. In this paper,the advantages of cinemas,audience demands,and documentary characteristics are comprehensively reviewed from an accepting perspective,and the existing state of China mainland's cinema documentaries is introduced from multiple levels such as the hot cinema media and sound-picture reconstruction, the film tradition and narrative reconstruction,and the film watching state and aesthetic reconstruction.展开更多
目的评价不同比例ASIR重建技术在能谱CT冠状动脉单能量图像中的应用价值,以寻求图像质量最佳的ASIR比例。方法共30例接受冠状动脉CT（Discovery CT750 HD）能谱扫描者入组。一次能谱成像获得5组单能量图像（60、65、70、75、80 ke V）,...目的评价不同比例ASIR重建技术在能谱CT冠状动脉单能量图像中的应用价值,以寻求图像质量最佳的ASIR比例。方法共30例接受冠状动脉CT（Discovery CT750 HD）能谱扫描者入组。一次能谱成像获得5组单能量图像（60、65、70、75、80 ke V）,同时每一组单能量图像分别进行不同比例ASIR重建（0%,20%,40%,60%,80%和100%）,共30组重建图像,对混合能量图像及各组单能量不同比例ASIR图像进行感兴趣区SNR值、CNR值的测定,并且按李克特量表4分法进行图像质量评价。结果与传统混合能量图像相比,能谱成像所得65 ke V单能量图像和100%ASIR比例重建显示的CNR和SNR最大改善,分别是144%,P〈0.001;173%,P〈0.001。而主观评价图像质量方面,则显示60~65 ke V与40%~60%ASIR相结合,较传统混合能量图像质量改善50%以上（P〈0.001）。结论冠状动脉CTA低剂量扫描技术[平均剂量（2.43±0.42）m SV],能谱CT 65~75ke V单能量和ASIR 40%~60%重建方案可以明显降低噪声,改善图像质量。展开更多
基金This paper is a stage result of a General Art Project from the National Social Science Foundation -Study on the interaction of documentary’s connotation development with its creation techniques and works forms( No.10BC031)supported by Advantageous Discipline Construction Project in Colleges and Universities of Jiangsu Province
文摘A new cinema documentary history is being written because of the new film watching experience,consumer pleasure,and aesthetic harvests achieved by the quality reconstruction of the world cinema documentaries. In this paper,the advantages of cinemas,audience demands,and documentary characteristics are comprehensively reviewed from an accepting perspective,and the existing state of China mainland's cinema documentaries is introduced from multiple levels such as the hot cinema media and sound-picture reconstruction, the film tradition and narrative reconstruction,and the film watching state and aesthetic reconstruction.
文摘目的评价不同比例ASIR重建技术在能谱CT冠状动脉单能量图像中的应用价值,以寻求图像质量最佳的ASIR比例。方法共30例接受冠状动脉CT（Discovery CT750 HD）能谱扫描者入组。一次能谱成像获得5组单能量图像（60、65、70、75、80 ke V）,同时每一组单能量图像分别进行不同比例ASIR重建（0%,20%,40%,60%,80%和100%）,共30组重建图像,对混合能量图像及各组单能量不同比例ASIR图像进行感兴趣区SNR值、CNR值的测定,并且按李克特量表4分法进行图像质量评价。结果与传统混合能量图像相比,能谱成像所得65 ke V单能量图像和100%ASIR比例重建显示的CNR和SNR最大改善,分别是144%,P〈0.001;173%,P〈0.001。而主观评价图像质量方面,则显示60~65 ke V与40%~60%ASIR相结合,较传统混合能量图像质量改善50%以上（P〈0.001）。结论冠状动脉CTA低剂量扫描技术[平均剂量（2.43±0.42）m SV],能谱CT 65~75ke V单能量和ASIR 40%~60%重建方案可以明显降低噪声,改善图像质量。
