目的探讨双能量虚拟去钙成像(VNCa)CT对中轴性脊柱关节炎相关骶髂关节炎病人骨髓水肿的诊断价值。材料与方法这项前瞻性研究连续收集2016年4月—2017年12月期间47例受试者[年龄14~41岁,平均27岁(男28例,年龄14~37岁,平均24岁;女19例,年...目的探讨双能量虚拟去钙成像(VNCa)CT对中轴性脊柱关节炎相关骶髂关节炎病人骨髓水肿的诊断价值。材料与方法这项前瞻性研究连续收集2016年4月—2017年12月期间47例受试者[年龄14~41岁,平均27岁(男28例,年龄14~37岁,平均24岁;女19例,年龄17~41岁,平均29岁)],行双能CT和3.0 T MRI检查。展开更多
The microwave absorbents of Fe and C nanoparticles as magnetic loss and dielectric loss material respectively were composited with the polyvinyl alcohol （PVA） as binder by spray granulation method, The electromagnet...The microwave absorbents of Fe and C nanoparticles as magnetic loss and dielectric loss material respectively were composited with the polyvinyl alcohol （PVA） as binder by spray granulation method, The electromagnetic parameters of Fe and C composite particles were analyzed by vector network. The complex permittivity and magnetic permeability of Fe and C composite particles matched well with increasing C nanoparticle content, and then the microwave loss property was improved. A minimum reflection loss （RL） of -42.7 dB at 3.68 GHz for a composite with 4.6 mm in thickness can be obtained when the content ratio of the C nanoparticles, the modified Fe nanoparticles and the PVA is 21：49：30 （Sample 3）.展开更多
文摘目的探讨双能量虚拟去钙成像(VNCa)CT对中轴性脊柱关节炎相关骶髂关节炎病人骨髓水肿的诊断价值。材料与方法这项前瞻性研究连续收集2016年4月—2017年12月期间47例受试者[年龄14~41岁,平均27岁(男28例,年龄14~37岁,平均24岁;女19例,年龄17~41岁,平均29岁)],行双能CT和3.0 T MRI检查。
基金the support from the National Natural Science Foundation of China(No.51171033)the Fundamental Research Funds for the Central Universities(DUT15LAB05,DUT16LAB03)
文摘The microwave absorbents of Fe and C nanoparticles as magnetic loss and dielectric loss material respectively were composited with the polyvinyl alcohol （PVA） as binder by spray granulation method, The electromagnetic parameters of Fe and C composite particles were analyzed by vector network. The complex permittivity and magnetic permeability of Fe and C composite particles matched well with increasing C nanoparticle content, and then the microwave loss property was improved. A minimum reflection loss （RL） of -42.7 dB at 3.68 GHz for a composite with 4.6 mm in thickness can be obtained when the content ratio of the C nanoparticles, the modified Fe nanoparticles and the PVA is 21：49：30 （Sample 3）.
