Abstract
In many transverse tomographic reconstruction techniques using filtered projections, ringing or overshoot is found in regions where the attenuation suddenly changes. Such artifacts are obtained with iterative techniques as well. A modification of the filter often used in corrected tomography which produces very small ringing in such regions is described. A transmission device such as the EMI Scanner was computer simulated. Projections were calculated through a phantom and the phantom then reconstructed using different filters. The phantom consisted of a disc with diameter 32 arbitrary units centred at the origin of the plane.