Search Results - "Pietrzyk, U."

GATE V6: a major enhancement of the GATE simulation platform enabling modelling of CT and radiotherapy by Jan, S, Benoit, D, Becheva, E, Carlier, T, Cassol, F, Descourt, P, Frisson, T, Grevillot, L, Guigues, L, Maigne, L, Morel, C, Perrot, Y, Rehfeld, N, Sarrut, D, Schaart, D R, Stute, S, Pietrzyk, U, Visvikis, D, Zahra, N, Buvat, I

“…GATE (Geant4 Application for Emission Tomography) is a Monte Carlo simulation platform developed by the OpenGATE collaboration since 2001 and first publicly…”
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High-throughput, accurate Monte Carlo simulation on CPU hardware for PET applications by Scheins, J J, Lenz, M, Pietrzyk, U, Shah, N J, Lerche, C

“…Monte Carlo simulations (MCS) represent a fundamental approach to modelling the photon interactions in positron emission tomography (PET). A variety of…”
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Technical Note: GATE‐RTion: a GATE/Geant4 release for clinical applications in scanned ion beam therapy by Grevillot, L., Boersma, D. J., Fuchs, H, Aitkenhead, A., Elia, A., Bolsa, M., Winterhalter, C., Vidal, M., Jan, S., Pietrzyk, U., Maigne, L., Sarrut, D.

“…Purpose GATE‐RTion is a validated version of GATE for clinical use in the field of light ion beam therapy. This paper describes the GATE‐RTion project and…”
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High performance volume-of-intersection projectors for 3D-PET image reconstruction based on polar symmetries and SIMD vectorisation by Scheins, J J, Vahedipour, K, Pietrzyk, U, Shah, N J

“…For high-resolution, iterative 3D PET image reconstruction the efficient implementation of forward-backward projectors is essential to minimise the calculation…”
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Early solutions till the development of PET/IRM by Pietrzyk, U

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Implementation of Cascade Gamma and Positron Range Corrections for I-124 Small Animal PET by Harzmann, S., Braun, F., Zakhnini, A., Weber, W. A., Pietrzyk, U., Mix, M.

“…Small animal Positron Emission Tomography (PET) should provide accurate quantification of regional radiotracer concentrations and high spatial resolution. This…”
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GATE: a simulation toolkit for PET and SPECT by Jan, S, Santin, G, Strul, D, Staelens, S, Assié, K, Autret, D, Avner, S, Barbier, R, Bardiès, M, Bloomfield, P M, Brasse, D, Breton, V, Bruyndonckx, P, Buvat, I, Chatziioannou, A F, Choi, Y, Chung, Y H, Comtat, C, Donnarieix, D, Ferrer, L, Glick, S J, Groiselle, C J, Guez, D, Honore, P F, Kerhoas-Cavata, S, Kirov, A S, Kohli, V, Koole, M, Krieguer, M, van der Laan, D J, Lamare, F, Largeron, G, Lartizien, C, Lazaro, D, Maas, M C, Maigne, L, Mayet, F, Melot, F, Merheb, C, Pennacchio, E, Perez, J, Pietrzyk, U, Rannou, F R, Rey, M, Schaart, D R, Schmidtlein, C R, Simon, L, Song, T Y, Vieira, J M, Visvikis, D, Van de Walle, R, Wieërs, E, Morel, C

“…Monte Carlo simulation is an essential tool in emission tomography that can assist in the design of new medical imaging devices, the optimization of…”
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Linking retinotopic fMRI mapping and anatomical probability maps of human occipital areas V1 and V2 by Wohlschläger, A.M., Specht, K., Lie, C., Mohlberg, H., Wohlschläger, A., Bente, K., Pietrzyk, U., Stöcker, T., Zilles, K., Amunts, K., Fink, G.R.

“…Using functional MRI, we characterized field sign maps of the occipital cortex and created three-dimensional maps of these areas. By averaging the individual…”
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Integration of FDG-PET/CT into external beam radiation therapy planning: technical aspects and recommendations on methodological approaches by Thorwarth, D, Beyer, T, Boellaard, R, de Ruysscher, D, Grgic, A, Lee, J A, Pietrzyk, U, Sattler, B, Schaefer, A, van Elmpt, W, Vogel, W, Oyen, W J G, Nestle, U

“…This work addresses the clinical adoption of FDG-PET/CT for image-guided radiation therapy planning (RTP). As such, important technical and methodological…”
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The ClearPET™ project: development of a 2nd generation high-performance small animal PET scanner by Ziemons, K., E. Auffray, Barbier, R., Brandenburg, G., Bruyndonckx, P., Choi, Y., Christ, D., Costes, N., Declais, Y., Devroede, O., Dujardin, C., Fedorovd, A., Heinrichs, U., Korjik, M., Krieguer, M., Kuntner, C., Largeron, G., Lartizien, C., Larue, H., Lecoq, P., Leonard, S., Marteau, J., Morel, Ch, Mosset, J.B., Parl, Ch, Pedrini, Ch, Petrosyan, A.G., Pietrzyk, U., Rey, M., Saladino, S., Sappey-Marinier, D., Simon, L., Streun, M., Tavernier, S., Vieira, J.M.

“…Second generation high-performance PET scanners, called ClearPET™11ClearPET is a trademark of the Crystal Clear Collaboration., have been developed by working…”
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A functional magnetic resonance imaging study of local/global processing with stimulus presentation in the peripheral visual hemifields by Lux, S, Marshall, J.C, Ritzl, A, Weiss, P.H, Pietrzyk, U, Shah, N.J, Zilles, K, Fink, G.R

“…When stimuli are presented in the left or right visual fields, hemispheric specialization for global and local processing in occipital areas is attenuated…”
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Does PET/CT render software registration obsolete? by Pietrzyk, U

“…It was the success of software-based image registration that eventually led to the introduction of hardware-based concepts for image fusion, such as combined…”
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Cache-optimised 3D PET image reconstruction using ordered subsets in combination with highly rotation-symmetric voxel assemblies by Scheins, J. J., Pietrzyk, U., Shah, N. J.

“…The introduction of highly rotation-symmetric voxel assemblies with intrinsic polar symmetries, as realised for example with the PET Reconstruction Software…”
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NEMA NU2-2001 guided performance evaluation of four Siemens ECAT PET scanners by Herzog, H., Tellmann, L., Hocke, C., Pietrzyk, U., Casey, M.E., Kuwert, T.

“…The NEMA NU 2-2001 protocol has been especially designed for the performance evaluation of whole-body positron emission tomography (PET) measurements with…”
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Clinical and diagnostic value of preoperative MR mammography and FDG-PET in suspicious breast lesions by Walter, C, Scheidhauer, K, Scharl, A, Goering, U-J, Theissen, P, Kugel, H, Krahe, T, Pietrzyk, U

“…Dynamic enhanced magnetic resonance (MR) mammography and fluorine-18 fluorodeoxyglucose positron emission tomography (FDG-PET) of the breast were directly…”
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Design optimization of the PMT-ClearPET prototypes based on simulation studies with GEANT3 by Heinrichs, U., Pietrzyk, U., Ziemons, K.

“…Within the Crystal Clear Collaboration (CCC), four centers are developing second generation high performance small animal positron emission tomography (PET)…”
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Progressive derangement of periinfarct viable tissue in ischemic stroke by Heiss, W D, Huber, M, Fink, G R, Herholz, K, Pietrzyk, U, Wagner, R, Wienhard, K

“…Sixteen patients were studied by multitracer positron emission tomography (PET) within 6-48 (mean of 23) h of onset of a hemispheric ischemic stroke and again…”
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An Interactive Technique for Three-Dimensional Image Registration: Validation for PET, SPECT, MRI and CT Brain Studies by Pietrzyk, Uwe, Herholz, Karl, Fink, Gereon, Jacobs, Andreas, Mielke, Rudiger, Slansky, Ina, Wurker, Michael, Heiss, Wolf-Dieter

“…A multipurpose three-dimensional registration technique was validated with PET, SPECT, CT and MRI scans, which had been obtained under normal clinical…”
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The ECAT EXACT HR: performance of a new high resolution positron scanner by Wienhard, K, Dahlbom, M, Eriksson, L, Michel, C, Bruckbauer, T, Pietrzyk, U, Heiss, W D

“…The ECAT EXACT HR is a newly designed CTI-Siemens PET scanner with high spatial resolution. Its physical performance with respect to resolution, count rate…”
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Multi-modality imaging of uveal melanomas using combined PET/CT, high-resolution PET and MR imaging by Beyer, T, Pietrzyk, U, Knoess, C, Vollmar, S, Wienhard, K, Kracht, L, Bockisch, A, Maderwald, S, Kühl, H, Fitzek, M

“…We investigated the efficacy of combined FDG-PET/CT imaging for the diagnosis of small-size uveal melanomas and the feasibility of combining separate,…”
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