ELECTROMAGNETIC FIELD PERTURBING OBJECT HAVING A BIOCOMPATIBLE EXTERIOR SURFACE AND A SELECTED DIELECTRIC PERMITTIVITY VALUE OR A SELECTED MAGNETIC PERMEABILITY VALUE
Described embodiments include an electromagnetic field perturbing object and a method. The electromagnetic field perturbing object includes a biocompatible exterior surface. The electromagnetic field perturbing object includes a dielectric permittivity value or magnetic permeability value such that an interaction between the perturbing object and a quasi-static radiofrequency electromagnetic field in an electromagnetic cavity creates a high contrast radiofrequency electric field having a power density localized to a volume adjoining the biocompatible exterior surface of the perturbing object. In an embodiment, the electromagnetic field perturbing object includes a dielectric permittivity value or magnetic permeability value configured to interact with a quasi-static radiofrequency electromagnetic field in an electromagnetic cavity and generate a high contrast radiofrequency electric field having a power density localized to a volume adjoining the biocompatible exterior surface of the perturbing object.