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We introduce the use of a novel physical phantom to quantify the performance of a motion-correction algorithm. The goal of the study was to assess a PET-PET image registration, the final output of which is a motion-corrected high-statistics PET image volume, a procedure called Reconstruct, Register and Average (RRA). Methods: A phantom was constructed using 5~2mL Ge-68 filled spheres suspended in...
EM reconstructions with point-spread-function (PSF) modelling is performed to increase the spatial resolution in PET images. These images exhibit slower initial convergence compared to reconstructions without PSF modelling. Furthermore, they exhibit more pronounced ringing around the edges of sharp features. We investigate the effect of different objects and PSF modelling on the convergence rate and...
We present an adaptive acquisition protocol design technique with the goal of improving local contrast-to-noise ratios (CNR) for flexible SPECT and PET scanners in which the data acquisition parameters at each view can be modulated. Such flexible scanners include rotating SPECT scanners, dual head coincidence imagers, SPECT scanners with variable collimators and those where collimators move in relation...
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