title: A cone-beam tomography algorithm for orthogonal circle-and-line orbit.
abstract: A cone-beam algorithm which provides a practical implementation of B D Smith's cone-beam inversion formula is presented. For a cone-beam vertex orbit consisting of a circle and an orthogonal line. This geometry is easy to implement in a SPECT system, and it satisfies the cone-beam data sufficiency condition. The proposed algorithm is in the form of a convolution-back projection, and requires a pre-filtering procedure. Computer simulations show a reduction of the artifacts that are found with the Feldkamp algorithm where the cone-beam vertex orbit is a circle.
authors.affiliation: Department of Radiology, University of Utah, Salt Lake City 84132.
authors.forename: G L
authors.initials: GL
authors.lastname: Zeng
authors.forename: G T
authors.initials: GT
authors.lastname: Gullberg
mesh_terms: D000465:Algorithms; D016477:Artifacts; D003198:Computer Simulation; D014055:Tomography, Emission-Computed / Q000379:methods*