Magnetically frustrated calcium-substituted SrMn 2 Fe 4 O 11 R-type hexaferrite nanoparticles for biomedical applications

substituted sample shows more cytotoxicity owing to small particle size as compared with the pure R-type hexagonal ferrite. To evaluate the route of radiolabelled NP's into the organs of rabbits the scintigraphy images were examined using a dual head SPECT gamma camera. The uptake counts are decreased over time in each organ with the maximum counts found in the bladder at the 4th hour owing to the gradual clearance of radiopharmaceuticals from the animal body.