Conference
Nuclear Science Symposium and Medical Imaging Conference
About: Nuclear Science Symposium and Medical Imaging Conference is an academic conference. The conference publishes majorly in the area(s): Detector & Iterative reconstruction. Over the lifetime, 8884 publications have been published by the conference receiving 58396 citations.
Topics: Detector, Iterative reconstruction, Imaging phantom, Image resolution, Silicon photomultiplier
Papers published on a yearly basis
Papers
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31 Oct 1993
TL;DR: The authors have collected over 300 MRI volumetric datasets from normal individuals and transformed these datasets into stereotaxic space using a 3D linear re-sampling algorithm, and generated a series of statistical measures which express this population nonlinear variability in the form of parametric volumes.
Abstract: Recently, there has been a rapid growth in the use of 3D multi-modal correlative imaging for studies of the human brain Regional cerebral blood flow (CBF) changes indicate brain areas involved in stimulus processing These focal changes are often too small ( >
1,530 citations
02 Nov 1991
TL;DR: In this article, a single-crystal inorganic scintillator, cerium-doped lutetium oxyorthosilicate (Lu/sub 2(1-x)/Ce/sub2x/(SiO/sub 4/) or LSO, was discussed.
Abstract: The authors discuss a single-crystal inorganic scintillator, cerium-doped lutetium oxyorthosilicate (Lu/sub 2(1-x)/Ce/sub 2x/(SiO/sub 4/) or LSO). It has a scintillation emission intensity which is approximately 75% of NaI(Tl) with a decay time of approximately 40 ns. The peak emission wavelength is 420 nm. It has a very high gamma-ray detection efficiency due to its density of 7.4 g/cm/sup 3/ and its effective atomic number of 66. Its radiation length of 1.14 cm is only slightly longer than bismuth germanate (BGO). The scintillation properties of Ce-doped LSO are compared to NaI(Tl), BGO, and cerium-doped gadolinium oxyorthosilicate (GSO). In addition to desirable physical properties such as high density and high atomic number, LSO also processes a combination of high emission intensity and fast decay which together are superior to any other known single crystal scintillator. >
783 citations
01 Oct 2010
TL;DR: In this article, the LHCb simulation application consists of two independent phases, the generation of the primary event and the tracking of particles produced in the experimental setup, and the design of the generator phase of Gauss is described: a modular structure with well defined interfaces specific to the various tasks, e.g. pp collisions, particles' decays, selections, etc.
Abstract: The LHCb simulation application. Gauss, consists or two independent phases, the generation of the primary event and the tracking of particles produced in the experimental setup. For the LHCh experimental program it is particularly important to model IS meson decays: the KvtGcn code developed in CLEO and BaBah has been chosen and customized for non-coherent B production as necuring in pp collisions at the LHC, The initial proton-proto n collision is provided by a different generator engine, currently PYTHIA 6 for massive prwluclion of signal and generic pp collisions events. Beam gas events, background events originating from proton halo, cosmics and calibration events for different detectors can be generated in addition to pp collisions. Different generator packages as available in the physics community or specifically developed in LHCb are used for the different purposes. Running conditions affecting the events generated such as the size of the luminous region, the number of collisions occuring in a bunch crossing and the number of spill-over events from neighbouring bunches are modeled via dedicated algorithms appropriately configured. The design of the generator phase of Gauss will be described: a modular structure with well defined interfaces specific to the various tasks, e.g. pp collisions, particles' decays, selections, etc. has been chosen. Different implementations are available for the various tasks allowing selecting and combining them as most appropriate at run time as in the case of Pythia 6 im pp collisions or HIJING for beam gas. The advantages of such structure, allowing for example to adopt transparently new generators packages will be discussed.
543 citations
24 Oct 1999
TL;DR: Initial results indicate that scatter correction may be accurately performed following, instead of prior to, either 3D reprojection or Fourier rebinning, thus making clinical whole-body scatter correction more practical.
Abstract: The authors report on a new numerical implementation of the single-scatter simulation scatter correction algorithm for 3D PET. Its primary advantage over the original implementation is that it is a much faster calculation, currently requiring less than 30 sec execution time per bed position for an adult thorax, thus making clinical whole-body scatter correction more practical. The new code runs on a single processor workstation CPU instead of a vector processor array, making it highly portable. It is modular and independent of any particular reconstruction code. The computed scatter contribution is now intrinsically scaled relative to the emission image and no longer requires normalization to the scatter tails in the sinogram when all activity is contained within the field of view, making it more robust against noise. The new algorithm has been verified against the original code on both phantom and human thorax studies. Initial results indicate that scatter correction may be accurately performed following, instead of prior to, either 3D reprojection or Fourier rebinning. Some evidence is presented that the single-scatter operator, when applied to an uncorrected emission image provides reasonable compensation for multiple scatter.
501 citations
01 Jan 2010
480 citations