A Study of Reconstruction Artifacts in Cone Beam Tomography Using Filtered Backprojection and Iterative Em Algorithms

  title={A Study of Reconstruction Artifacts in Cone Beam Tomography Using Filtered Backprojection and Iterative Em Algorithms},
  author={Gengsheng Larry Zeng and Grant T. Gullberg},
Reconstruction artifacts in cone beam tomography are studied for filtered backprojection (Feldkamp) and iterative EM algorithms. The filtered backprojection algorithm uses a voxeldriven, interpolated backprojection to reconstruct the cone beam data; whereas, the iterative EM algorithm performs raydriven projection and backprojection operations for each iteration. Two weighting schemes for the projection and backprojection operations in the EM algorithm are studied. One weights each voxel by the… CONTINUE READING
Highly Cited
This paper has 31 citations. REVIEW CITATIONS


Publications citing this paper.
Showing 1-10 of 12 extracted citations

Preliminary Investigation of Axial and Angular Sampling in Multi-Pinhole AdaptiSPECT-C with XCAT Phantoms

2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) • 2017

Image reconstruction considerations in molecular breast imaging tomosynthesis

IEEE Nuclear Science Symposuim & Medical Imaging Conference • 2010
View 1 Excerpt

One-step Backprojection Algorithm for Computed Tomography

2006 IEEE Nuclear Science Symposium Conference Record • 2006


Publications referenced by this paper.
Showing 1-10 of 23 references

Iterative reconstruction algorithm for single photon emission computed tomography with cone beam geometry

Inf . J . of Imag . Sys . & • 1989

Maximum likelihood reconstruction for cone beam SPECT with camera tilt

G. T. Gullberg
IEEE Trans . Nucl . Sci . • 1989

SPECT using a specially designed cone beam collimator.

Journal of nuclear medicine : official publication, Society of Nuclear Medicine • 1988

Gullberg, “An analytical approach to quantify uniformity artifacts for circular and non-circular motion in SPECT imaging,

G T.
Med. Phys., • 1987

An astigmatic collimator for high sensitivity SPECT of the brain,

E. G. Hawman, J. Hsieh
J . Nucl. Med., • 1986

Similar Papers

Loading similar papers…