Microwave imaging of cylindrical inhomogeneities by using a plane wave spectrum of diffracted field

Tomographic methods of image reconstruction of two-dimensional cross-sections of volumetric objects in millimeter wavelength band are suggested and considered. It is shown that in the frequency band under consideration, the images of investigated objects may be obtained by first-order diffraction tomography method (Born, Rytov or high frequency approximation of the first-order for scattered electromagnetic field).