title: A Hankel transform approach to tomographic image reconstruction.
abstract: A relatively unexplored algorithm is developed for reconstructing a two-dimensional image from a finite set of its sampled projections. The algorithm, referred to as the Hankel-transform-reconstruction (HTR) algorithm, is polar-coordinate based. The algorithm expands the polar-form Fourier transform F(r,theta) of an image into a Fourier series in theta calculates the appropriately ordered Hankel transform of the coefficients of this series, giving the coefficients for the Fourier series of the polar-form image f(p,phi); resolves this series, giving a polar-form reconstruction; and interpolates this reconstruction to a rectilinear grid. The HTR algorithm is outlined, and it is shown that its performance compares favorably to the popular convolution-backprojection algorithm.
authors.affiliation: Biodynamics Res. Unit, Mayo Clinic, Rochester, MN.
authors.forename: W E
authors.initials: WE
authors.lastname: Higgins
authors.forename: D R
authors.initials: DR
authors.lastname: Munson