Feldkamp principles

Algorithms that are based upon the Feldkamp principles have found favor in practice because of their good image quality and fast computational speed. However, the circular path that the source... 

The scanning schemes that have been adapted to the above principle may involve the spiral/ helical motion that requires lateral displacement with rotation. Extensions of the Feldkamp algorithm, for quite general three-dimensional scaiming loci, have been developed by Wang et al. For further discussions on the approximate and accurate cone-beam reconstruction the reader is referred to Ref. 17. 

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