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Matej, Samuel; Daube-Witherspoon, Margaret E; Karp, Joel S (2016) Analytic TOF PET reconstruction algorithm within DIRECT data partitioning framework. Phys Med Biol 61:3365-86
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Matej, Samuel; Li, Yusheng; Panetta, Joseph et al. (2016) Image-based Modeling of PSF Deformation with Application to Limited Angle PET Data. IEEE Trans Nucl Sci 63:2599-2606
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Li, Yusheng; Defrise, Michel; Metzler, Scott D et al. (2015) Transmission-less attenuation estimation from time-of-flight PET histo-images using consistency equations. Phys Med Biol 60:6563-83
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Ha, S; Matej, S; Ispiryan, M et al. (2013) GPU-Accelerated Forward and Back-Projections with Spatially Varying Kernels for 3D DIRECT TOF PET Reconstruction. IEEE Trans Nucl Sci 60:166-173
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Metzler, Scott D; Matej, Samuel; Karp, Joel S (2013) Resolution Enhancement in PET Reconstruction Using Collimation. IEEE Trans Nucl Sci 60:65-75
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Daube-Witherspoon, Margaret E; Matej, Samuel; Werner, Matthew E et al. (2012) Comparison of list-mode and DIRECT approaches for time-of-flight PET reconstruction. IEEE Trans Med Imaging 31:1461-71
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Vunckx, Kathleen; Zhou, Lin; Matej, Samuel et al. (2010) Fisher information-based evaluation of image quality for time-of-flight PET. IEEE Trans Med Imaging 29:311-21
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Matej, Samuel; Surti, Suleman; Jayanthi, Shridhar et al. (2009) Efficient 3-D TOF PET reconstruction using view-grouped histo-images: DIRECT-direct image reconstruction for TOF. IEEE Trans Med Imaging 28:739-51
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Matej, Samuel; Kazantsev, Ivan G (2006) Fourier-based reconstruction for fully 3-D PET: optimization of interpolation parameters. IEEE Trans Med Imaging 25:845-54
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Matej, Samuel; Fessler, Jeffrey A; Kazantsev, Ivan G (2004) Iterative tomographic image reconstruction using Fourier-based forward and back-projectors. IEEE Trans Med Imaging 23:401-12
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