Fig. 7From: Facile Fabrication of BiF3: Ln (Ln = Gd, Yb, Er)@PVP Nanoparticles for High-Efficiency Computed Tomography ImagingBiF3: Ln@PVP NPs in vivo CT imaging effect. A CT images before and after BiF3: Ln@PVP NPs injection and B the corresponding CT value. The red circle indicates tumor tissueBack to article page