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3-D Reconstruction for Diverging X-Ray Beams

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4 Author(s)
Reed, I.S. ; Department of Electrical Engineering University of Southern California Los Angeles, California 90007 ; Truong, T.K. ; Chang, C.M. ; Kwoh, Y.S.

It is shown here that the fast digital convolution technique used for parallel x-ray beams can be used also to reconstruct a density function for diverging x-ray beams. This technique when combined with what was called previously a generalized ¿¿¿-filter yields good accuracy, a flexibility to cope with noise and a substantial reduction in the x-ray dosage. Finite field transforms and zero-order interpolation can be used also to improve the speed of the x-ray reconstruction process. Tests based on these methods are performed on an ideal phantom. A detailed comparison is made between a system using diverging beams, and a system using parallel beams with simulated data.

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Nuclear Science, IEEE Transactions on  (Volume:25 ,  Issue: 3 )