49 citations · 130 across the 7 of their papers we have counts for
7 papers
Fast and memory-efficient reconstruction of sparse Poisson data in listmode with non-smooth priors with application to time-of-flight PET
Georg Schramm, Martin Holler
Complete time of flight (TOF) sinograms of state-of-the-art TOF PET scanners have a large memory footprint. Currently, they contain ~4e9 data bins which amount to ~17GB in 32bit fl…
One-step inversion algorithms for spectral CT, with application to dynamic Cone Beam CT
Frederic Jolivet, Georg Schramm, Johan Nuyts
Dual Energy Cone Beam Computed Tomography (DE-CBCT) is a promising technique for several medical applications, including dynamic angiography. Recently, a dynamical two-step method…
Proceedings of the 16th Virtual International Meeting on Fully 3D Image Reconstruction in Radiology and Nuclear Medicine
Georg Schramm, Ahmadreza Rezaei, Kris Thielemans +1
These proceedings contain the presented papers at the 16th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine 2021, which was t…
Regional accuracy of ZTE-based attenuation correction in static and dynamic brain PET/MR
Georg Schramm, Michel Koole, Stefanie M. A. Willekens +7
Accurate MR-based attenuation correction (MRAC) is essential for quantitative PET/MR imaging of the brain. In this study, we analyze the regional bias caused by MRAC based on Zero-…
Nuclear deformation and neutron excess as competing effects for pygmy dipole strength
R. Massarczyk, R. Schwengner, F. Dönau +27
The electromagnetic dipole strength below the neutron-separation energy has been studied for the xenon isotopes with mass numbers A = 124, 128, 132, and 134 in nuclear resonance fl…
Neutron total cross section measurements of gold and tantalum at the nELBE photoneutron source
Roland Hannaske, Zoltan Elekes, Roland Beyer +13
Neutron total cross sections of Au and Ta have been measured at the nELBE photoneutron source in the energy range from 0.1 - 10 MeV with a statistical uncertai…
Description of dipole strength in heavy nuclei in conformity with their quadrupole degrees of freedom
Eckart Grosse, Arnd R. Junghans, Ralph Massarczyk +2
In conformity to new findings about the widespread occurrence of triaxiality arguments are given in favor of a description of the giant dipole resonance in heavy nuclei by the sum…