The explanation for these different results could be linked to the fact that the studies were performed on different tumor types and check details with different therapy regimens.”
“The cubic force field of protonated cyanogen, HNCCN+, has been calculated at the CCSD(T) level of theory employing correlation consistent bases

of quadruple-zeta quality. Semi-experimental equilibrium structures have then been derived from the experimental ground-state rotational constants available for various isotopologues and the corresponding vibrational corrections calculated from the theoretical force fields. While a good agreement has been found with the pure theoretical best estimate of equilibrium geometry, computed at the CCSD(T) level of theory accounting for basis set truncation as well as including core correlation corrections, large discrepancies have been noted with the experimental substitution, r(s), as well as effective, r(o), structures. (C) 2009 Elsevier Inc. All rights reserved.”
“Objective: To describe and validate the simulation of the basic features of GE Millennium MG gamma camera using the GATE Monte Carlo platform. Material and methods: Crystal size and thickness, parallel-hole collimation and a realistic energy

acquisition window were simulated in the GATE platform. GATE results were compared to experimental data in the following imaging conditions: a point source of Tc-99m IWR-1-endo ic95 at different positions during static imaging and tomographic acquisitions using two different energy windows. The accuracy between the events expected

and detected by simulation was obtained with the Mann-Whitney-Wilcoxon test. Comparisons were made regarding the measurement of sensitivity selleck kinase inhibitor and spatial resolution, static and tomographic. Simulated and experimental spatial resolutions for tomographic data were compared with the Kruskal-Wallis test to assess simulation accuracy for this parameter. Results: There was good agreement between simulated and experimental data. The number of decays expected when compared with the number of decays registered, showed small deviation ( smaller than = 0.007%). The sensitivity comparisons between static acquisitions for different distances from source to collimator (1, 5, 10, 20, 30 cm) with energy windows of 126-154 key and 130-158 keV showed differences of 4.4%, 5.5%, 4.2%, 5.5%, 4.5% and 5.4%, 6.3%, 6.3%, 5.8%, 5.3%, respectively. For the tomographic acquisitions, the mean differences were 7.5% and 9.8% for the energy window 126-154 keV and 130-158 keV. Comparison of simulated and experimental spatial resolutions for tomographic data showed no statistically significant differences with 95% confidence interval. Conclusions: Adequate simulation of the system basic features using GATE Monte Carlo simulation platform was achieved and validated. (C) 2013 Elsevier Espana, S.L. and SEMNIM. All rights reserved.