Under the Born approximation, the effect of view angle variations on image reconstruction in vector diffraction tomography is investigated. This paper deals with internal image reconstructions of infinitely long lossless and lossy dielectric cylinders placed in free space. Emphasis is placed on showing how both the co-polarized and the cross-polarized diffracted terms vary with incidence angle in the image reconstruction because any oblique incidence on a curved surface always produces depolarization. The cross-polarized component was found to contain object information on edges, i.e., the boundary position of the cylinder. It is shown that polarization utilization will play an important role in precise image reconstruction in microwave diffraction tomography.