Two analytical reconstruction algorithms for spiral cone-beam computerized tomography

The Katsevich and FDK reconstruction algorithms for cone-beam spiral scan were studied and compared. The results showed that FDK algorithm and Katsevich algorithm obtained good results when the projection data did not contain noise; however, when the Katsevich algorithm was used to compute the derivative of the projection data containing noise for the reconstruction of actual object, the reconstruction quality declined because this algorithm was sensitive to the noise of projection data.