PET Image Reconstruction Incorporating 3D Mean-Median Sinogram Filtering

Siti Salasiah Mokri, M. I. Saripan, Ashrani Aizzuddin Abd Rahni, A. J. Nordin, S. Hashim, M. H. Marhaban

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Positron Emission Tomography (PET) projection data or sinogram contained poor statistics and randomness that produced noisy PET images. In order to improve the PET image, we proposed an implementation of pre-reconstruction sinogram filtering based on 3D mean-median filter. The proposed filter is designed based on three aims; to minimise angular blurring artifacts, to smooth flat region and to preserve the edges in the reconstructed PET image. The performance of the pre-reconstruction sinogram filter prior to three established reconstruction methods namely filtered-backprojection (FBP), Maximum likelihood expectation maximization-Ordered Subset (OSEM) and OSEM with median root prior (OSEM-MRP) is investigated using simulated NCAT phantom PET sinogram as generated by the PET Analytical Simulator (ASIM). The improvement on the quality of the reconstructed images with and without sinogram filtering is assessed according to visual as well as quantitative evaluation based on global signal to noise ratio (SNR), local SNR, contrast to noise ratio (CNR) and edge preservation capability. Further analysis on the achieved improvement is also carried out specific to iterative OSEM and OSEM-MRP reconstruction methods with and without pre-reconstruction filtering in terms of contrast recovery curve (CRC) versus noise trade off, normalised mean square error versus iteration, local CNR versus iteration and lesion detectability. Overall, satisfactory results are obtained from both visual and quantitative evaluations.

Original languageEnglish
Article number7407515
Pages (from-to)157-169
Number of pages13
JournalIEEE Transactions on Nuclear Science
Volume63
Issue number1
DOIs
Publication statusPublished - 1 Feb 2016

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Positron emission tomography
image reconstruction
Image reconstruction
positrons
tomography
filters
iteration
Signal to noise ratio
signal to noise ratios
Median filters
blurring
evaluation
Set theory
Mean square error
lesions
Maximum likelihood
simulators
set theory
artifacts
Simulators

Keywords

  • Filtered-backprojection
  • maximum likelihood expectation maximization OSEM
  • mean and median filters
  • median root prior
  • PET sinogram

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Nuclear Energy and Engineering
  • Nuclear and High Energy Physics

Cite this

PET Image Reconstruction Incorporating 3D Mean-Median Sinogram Filtering. / Mokri, Siti Salasiah; Saripan, M. I.; Abd Rahni, Ashrani Aizzuddin; Nordin, A. J.; Hashim, S.; Marhaban, M. H.

In: IEEE Transactions on Nuclear Science, Vol. 63, No. 1, 7407515, 01.02.2016, p. 157-169.

Research output: Contribution to journalArticle

Mokri, Siti Salasiah ; Saripan, M. I. ; Abd Rahni, Ashrani Aizzuddin ; Nordin, A. J. ; Hashim, S. ; Marhaban, M. H. / PET Image Reconstruction Incorporating 3D Mean-Median Sinogram Filtering. In: IEEE Transactions on Nuclear Science. 2016 ; Vol. 63, No. 1. pp. 157-169.
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