Maximum likelihood reconstruction for cone beam spect with camera tilt


Journal Article

Iterative Maximum Likelihood (ML) reconstruction techniques are extended to the cone beam SPECT geometry with camera head tilted relative to the axis of rotation. The resulting code is an extension of a previous cone beam ML code for the untilted case. The details of the code development are described, which includes the variable camera sensitivity, but excludes resolution, attenuation, and scatter. The code is tested as a function of iteration in comparison with an existing tilt angle filtered backprojection (FBP) code, which has known distortions due to an incomplete theory. For a variety of point sources, as well as for a brain phantom, the tilt angle cone beam ML code (TCBML) performs visually and quantitatively better than cone beam FBP (CB-FBP), and it removes the distortions inherent in CB-FBP. The TCBML code requires substantial computation time which depends on the source geometry being reconstructed and varies in the present work from 3.5 to 50 times longer than the CB-FBP code. © 1989 IEEE

Full Text

Duke Authors

Cited Authors

  • Manglos, SH; Jaszczak, RJ; McAfee, JG

Published Date

  • January 1, 1989

Published In

Volume / Issue

  • 36 / 1

Start / End Page

  • 1117 - 1121

Electronic International Standard Serial Number (EISSN)

  • 1558-1578

International Standard Serial Number (ISSN)

  • 0018-9499

Digital Object Identifier (DOI)

  • 10.1109/23.34615

Citation Source

  • Scopus