Computationally efficient iterative transmission imaging for the inveon DPET

Mark W. Lenox, Jens Gregor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Transmission measurements are performed on PET tomographs to create attenuation correction factors in support of quantitatively accurate images. The Inveon Dedicated PET (DPET), a state-of-the-art small animal imaging system is an example of such a system. We report on the design and implementation of an iterative reconstruction approach that incorporates an explicit model of the system geometry. Although iterative algorithms are known to be computationally costly compared with analytic reconstruction methods, we show that the weighted least-squares computation considered in our case can be made computationally efficient. Indeed, we show that a high-quality transmission image can be reconstructed in under a minute. Computational speed is gained algorithmically through the use of relaxation and ordered-subsets, and implementation wise through the use of Intel's SSE vector instructions and multi-core techniques. Experimental results are provided for both phantom and real data.

Original languageEnglish (US)
Title of host publication2009 1st Annual ORNL Biomedical Science and Engineering Conference, BSEC 2009
DOIs
StatePublished - Oct 20 2009
Externally publishedYes
Event2009 1st Annual ORNL Biomedical Science and Engineering Conference, BSEC 2009 - Oak Ridge, TN, United States
Duration: Mar 18 2009Mar 19 2009

Other

Other2009 1st Annual ORNL Biomedical Science and Engineering Conference, BSEC 2009
CountryUnited States
CityOak Ridge, TN
Period3/18/093/19/09

Fingerprint

Image communication systems
Least-Squares Analysis
Imaging systems
Animals
Imaging techniques
Geometry

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging

Cite this

Lenox, M. W., & Gregor, J. (2009). Computationally efficient iterative transmission imaging for the inveon DPET. In 2009 1st Annual ORNL Biomedical Science and Engineering Conference, BSEC 2009 [5090483] https://doi.org/10.1109/BSEC.2009.5090483

Computationally efficient iterative transmission imaging for the inveon DPET. / Lenox, Mark W.; Gregor, Jens.

2009 1st Annual ORNL Biomedical Science and Engineering Conference, BSEC 2009. 2009. 5090483.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Lenox, MW & Gregor, J 2009, Computationally efficient iterative transmission imaging for the inveon DPET. in 2009 1st Annual ORNL Biomedical Science and Engineering Conference, BSEC 2009., 5090483, 2009 1st Annual ORNL Biomedical Science and Engineering Conference, BSEC 2009, Oak Ridge, TN, United States, 3/18/09. https://doi.org/10.1109/BSEC.2009.5090483
Lenox MW, Gregor J. Computationally efficient iterative transmission imaging for the inveon DPET. In 2009 1st Annual ORNL Biomedical Science and Engineering Conference, BSEC 2009. 2009. 5090483 https://doi.org/10.1109/BSEC.2009.5090483
Lenox, Mark W. ; Gregor, Jens. / Computationally efficient iterative transmission imaging for the inveon DPET. 2009 1st Annual ORNL Biomedical Science and Engineering Conference, BSEC 2009. 2009.
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