EXACT FBP TYPE ALGORITHM FOR ARBITRARY TRAJECTORIES

摘要

Exact methods of FBP reconstruction may have the restriction that the object point to be reconstructed and the first and last source position used for back- projection must lie on a line. According to an exemplary embodiment of the present invention, a method of FBP reconstruction is provided, comprising a filtering of the projection data along a projected M-line and a back-projecting of the filtered projection data over an interval larger than the PI interval of the object point. This may provide for an exact FBP type algorithm for arbitrary trajectories.