Computed Tomography (CT) has made a revolutionary impact on medical diagnosis and industrial non-destructive testing. However

it is not always possible to acquire projection data through a complete CT angular range in some real applications

such as imaging system design constraints. The conventional and most commonly used method for reconstruction from tomographic projections is the analytical reconstruction technique which is not so adaptable to incomplete projection data and results in poor reconstructions with severe artifacts in limited angle cases. Two reconstruction algorithms for limited angle cases are illustrated and the performance of algorithms is shown.