Inverse Radon Transform-Based Image Reconstruction using Various Frequency Domain Filters in Parallel Beam Transmission Tomography

Inverse Radon transform based image reconstruction is of prime importance in various areas of science and engineering. Over the years, many techniques have emerged as possible alternative to exact analytical solution including back-projection (BP) and filtered back-projection (FBP). In FBP various filters are applied namely Ram-Lak (ramp), Shepp-Logan, Cosine, Hamming and Hanning filters. These techniques are applied to the head phantom and the lung phantom. Best results as reconstructed image are obtained by FBP technique using Hanning filter, which is in agreement with findings of other researchers. Additionally, FBP technique using Hamming filter has been found as effective as FBP Hanning filter technique in both cases.