title: True three-dimensional cone-beam reconstruction (TTCR) algorithm.
abstract: A true three-dimensional cone-beam reconstruction (TTCR) algorithm for direct volume image reconstruction from 2-D cone-beam projections is developed for the complete sphere geometry. The algorithm is derived from the parallel-beam true three-dimensional reconstruction (TTR) algorithm and is based on the modified filtered backprojection technique, which uses a set of 2-D space-invariant filters. The proposed algorithm proved to be superior in spatial resolution to the parallel-beam TTR algorithm and to offer better computational efficiency.
authors.affiliation: Dept. of Radiol., Columbia Univ., New York, NY.
authors.forename: S Z
authors.initials: SZ
authors.lastname: Lee
authors.forename: J B
authors.initials: JB
authors.lastname: Ra
authors.forename: S K
authors.initials: SK
authors.lastname: Hilal
authors.forename: Z H
authors.initials: ZH
authors.lastname: Cho