CT imaging of tungsten oxide nanoparticles (WO3-x@BSA) / 中国医学影像技术

ABSTRACT

Objective To investigate the value of CT taking WO3-x@BSA nanoparticles as contrast agents.Methods CT values of WO3-x@BSA nanoparticles and the iohexol contrast agents at different concentrations were measured.When the tube voltage was the same,CT values of the tungsten at different concentrations were measured,and the relationship curve of CT values and the concentrations,the tube voltages and CT values were plotted.The animal models were performed to observe CT imaging in vivo and in vitro.WO3-x@BSA nanoparticles were injected through tail vein and intraperitoneally of rats in vivo.In fresh pig liver,WO3-x@BSA nanoparticles were injected by portal vein.Results CT value of the tungsten was higher than the iodine at the same concentration,and the imaging signal of the tungsten was more significant than the iodine.The amount of WO3-x@BSA was less than the iohexol contrast agent reaching to the same CT value.WO3-x@BSA nanoparticles could reach the organs of various tissues in SD rats through different ways and showing the high density sig nal.WO3-x@BSA nanoparticles were also injected into the fresh in-vitro liver of pig,and could diffuse and distribute along with the blood vessels with good CT imaging.Conclusion As a novel CT contrast agent,WO3-x@BSA nanoparticles can be used to get good CT imaging.