Compensation for collimator divergence in spect using inverse Monte Carlo reconstruction


Journal Article

The Inverse Monte Carlo (IMOC) reconstruction algorithm achieved compensation for two degrading collimator effects in SPECT imaging: position dependence and radial/tangential asymmetry in reconstructed resolution. With filtered backprojection using a ramp filter, Full Width at Half Maximum (radial and tangential respectivly) for a line source on axis with a high sensitivity collimator were 19.3mm and l6.4mm. At 12cm off axis, FWHM were 14.8mm and 8.2mm respectivly. With IMOC after 35 iterations, FWHM on axis were 8.4mm and 7.7mm while off axis FWHM were 6.0mm and 7.4mm respectivly. Thus, for the simple imaging task of line sources with no background activity using simulated projection data, IMOC provides compensation for the collimator effects in addition to providing higher resolution. © 1988 IEEE

Full Text

Duke Authors

Cited Authors

  • Floyd, CE; Jaszczak, RJ; Manglos, SH

Published Date

  • January 1, 1988

Published In

Volume / Issue

  • 35 / 1

Start / End Page

  • 784 - 787

Electronic International Standard Serial Number (EISSN)

  • 1558-1578

International Standard Serial Number (ISSN)

  • 0018-9499

Digital Object Identifier (DOI)

  • 10.1109/23.12832

Citation Source

  • Scopus