Embodiments of the present invention provide methods of detecting cancer, methods of treating cancer using targeted hyperthermia, methods of treating cancer using targeted chemical agents, methods of treating cancer comprising accurate measurements of the efficacy of treatments. The effect of nanoparticles on magnetic fields can be used to determine the location of a tumor, and a measure of the number of cells in the tumor. This location and measure can be used to guide therapy, and provide information regarding the most effective therapy to be applied. The same nanoparticles can be used to facilitate hyperthermia treatments, and to allow targeted application of chemical therapeutic agents.
