According to one or more aspects of the disclosed subject matter, reconstructing 3D radio frequency tomographic images can include detecting a plurality of frequencies of a target and generating a low resolution image for each frequency. Additionally, a high frequency low resolution image can be selected from the plurality of low resolution images to be a reference image. Further, pixel values of the reference image can be obtained and the pixel values of the reference image can be compared to each of the plurality of low resolution images. The method can also include determining new features in each of the low resolution images based on the comparisons, generating a high resolution grid based on the new features determined by the comparisons, wherein the high resolution grid is generated using interpolation, performing deconvolution of the high resolution grid using a Wiener filter, and outputting a high resolution image.