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  • Julian C. Matthews, Georgios I. Angelis, Fotis A. Kotasidis, Pawel J. Markiewicz, Andrew J. Reader
  • Computer Science
  • IEEE Nuclear Science Symposuim & Medical Imaging…
  • 2010 (First Publication: 1 October 2010)
  • Direct application of the expectation maximisation (EM) algorithm to the spatiotemporal maximum likelihood problem results in a convenient separation of the image based problem from the projectionExpand
  • Fotis A. Kotasidis, Julian C. Matthews, +5 authors Andrew J. Reader
  • Physics, Medicine
  • Physics in medicine and biology
  • 2011 (First Publication: 21 May 2011)
  • Incorporation of a resolution model during statistical image reconstruction often produces images of improved resolution and signal-to-noise ratio. A novel and practical methodology to rapidly andExpand
  • F. Kotasidis, J. Matthews, A. Reader, G. Angelis, H. Zaidi
  • Computer Science, Medicine
  • IEEE Nuclear Science Symposium and Medical…
  • 2012 (First Publication: 21 October 2014)
  • Direct 4D image reconstruction algorithms can improve kinetic parameter precision and accuracy in dynamic PET/CT body imaging but in contrast to post-reconstruction kinetic analysis, errors in badlyExpand
  • Fotis A. Kotasidis, Julian C. Matthews, Georgios I. Angelis, Pawel J. Markiewicz, William Lionheart, Andrew J. Reader
  • Computer Science
  • IEEE Nuclear Science Symposium Conference Record
  • 2011 (First Publication: 1 October 2011)
  • Direct parametric image reconstruction has the potential to reduce variance in parameter estimates when applied to PET/CT data. One complication when estimating parametric maps in the body is theExpand
  • Georgios I. Angelis, Kris Thielemans, Andri C. Tziortzi, Federico E. Turkheimer, Charalampos Tsoumpas
  • Mathematics, Computer Science, Medicine
  • Comput. Medical Imaging Graph.
  • 2011 (First Publication: 1 July 2011)
  • In dynamic positron emission tomography data many researchers have attempted to exploit kinetic models within reconstruction such that parametric images are estimated directly from measurements. ThisExpand
  • Georgios I. Angelis, Andrew J. Reader, Pawel J. Markiewicz, Fotis A. Kotasidis, William Lionheart, Julian C. Matthews
  • Computer Science, Medicine, Mathematics
  • Physics in medicine and biology
  • 2013 (First Publication: 7 August 2013)
  • Recent studies have demonstrated the benefits of a resolution model within iterative reconstruction algorithms in an attempt to account for effects that degrade the spatial resolution of theExpand