Single-slice rebinning method for helical cone-beam CT

In this paper, we present reconstruction results from helical cone-beam CT data, obtained using a simple and fast algorithm, which we call the CB-SSRB algorithm. This algorithm combines the single-slice rebinning method of PE T imaging with the weighting schemes of spiral CT algorithms. The reconstru ction is approximate but can be performed using 2D multislice fan-beam filt ered backprojection. The quality of the results is surprisingly good, and f ar exceeds what one might expect, even when the pitch of the helix is large . In particular, with this algorithm comparable quality is obtained using h elical cone-beam data with a normalized pitch of 10 to that obtained using standard spiral CT reconstruction with a normalized pitch of 2.