Fig. 2From: Non-invasive Photodynamic Therapy in Brain Cancer by Use of Tb3+-Doped LaF3 Nanoparticles in Combination with Photosensitizer Through X-ray Irradiation: A Proof-of-Concept StudyThe viability of LaF3:Tb nanoparticles. LaF3:Tb nanoparticles assessed in 3T3 cells were determined using various concentrations by use of the WST-1 assay. Cells exposed to 1% Triton X-100 solution were regarded as positive control. Values are mean ± SD in triplicateBack to article page