A system and method for detecting permittivity and conductivity boundaries within a high resolution spatial image of a material is presented. Electrical properties of a material, such as permittivity and conductivity, may assist in identification of physical properties of the material. Structural boundaries within tissue may be identified in spatial images, such as MR images. Image reconstruction algorithms may combine these structural boundaries with microwave images of the tissue to determine the permittivity and conductivity parameters within the structural boundaries. In the case of soft tissue, the microwave images may be captured simultaneously with the spatial images. The microwave images may be taken at a different time from the spatial image for rigid tissue. The method may be employed for two dimensional or three dimensional image reconstruction.
