Azadbakht, Omid Divband, Ghasemali Shafiee, Mohsen Baheri, Sahar Hosseini, Vahid Hasanpour, Erfan
Published in
Egyptian Journal of Radiology and Nuclear Medicine
BackgroundThere are several ways to diagnose coronary artery disease. Myocardial perfusion imaging (MPI) is used for the diagnosis of coronary artery disease. One of the practical challenges in scan’s interpretation is interfering liver radiotracer uptake with appropriate cardiac visualization. For many years, different approaches were evaluated fo...
Iakymchuk, Roman Barreda, Maria Graillat, Stef Aliaga, José Quintana-Ortí, Enrique
The Preconditioned Conjugate Gradient method is often employed for the solution of linear systems of equations arising in numerical simulations of physical phenomena. While being widely used, the solver is also known for its lack of accuracy while computing the residual. In this article, we propose two algorithmic solutions that originate from the ...
Neau, Hervé Pigou, Maxime Fede, Pascal Ansart, Renaud Baudry, Cyril Mérigoux, Nicolas Laviéville, Jérome Fournier, Yvan Renon, Nicolas Simonin, Olivier
...
For the last 30 years, experimental and modeling studies have been carried out on fluidized bed reactors from laboratory up to industrial scales. The application of developed models for predictive simulations has however been strongly limited by the available computational power and the capability of computational fluid dynamics software to handle ...
Juan Ramon, Albert Yang, Yongyi Wernick, Miles N Pretorius, P Hendrik Johnson, Karen L Slomka, Piotr J King, Michael A
Published in
Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology
We previously optimized several reconstruction strategies in SPECT myocardial perfusion imaging (MPI) with low dose for perfusion-defect detection. Here we investigate whether reducing the administered activity can also maintain the diagnostic accuracy in evaluating cardiac function. We quantified the myocardial motion in cardiac-gated stress 99m-T...
Acampa, Wanda Rozza, Francesco Zampella, Emilia Assante, Roberta Mannarino, Teresa Nappi, Carmela Mainolfi, Ciro Petretta, Mario Trimarco, Bruno Cuocolo, Alberto
...
Published in
Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology
We evaluated the warranty period of a normal stress myocardial perfusion single-photon emission computed tomography (MPS) in hypertensive patients. A total of 471 consecutive hypertensive patients with suspected coronary artery disease and normal perfusion at stress MPS were followed for a mean of 76 ± 21 months. Endpoint events were cardiac death ...
Nappi, Carmela Acampa, Wanda Nicolai, Emanuele Daniele, Stefania Zampella, Emilia Assante, Roberta Gaudieri, Valeria Mannarino, Teresa Petretta, Mario Cuocolo, Alberto
...
Published in
Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology
A normal stress myocardial perfusion single-photon emission computed tomography (MPS) is associated with a good clinical outcome. New iterative algorithms, such as wide beam reconstruction (WBR), which improve image interpretation with half-dose or half-time acquisition, have been proposed for cardiac MPS. The aim of this study was to assess the lo...
Steffen, Dominik A Giannopoulos, Andreas A Grossmann, Marvin Messerli, Michael Schwyzer, Moritz Gräni, Christoph Gebhard, Cathérine Pazhenkottil, Aju P Kaufmann, Philipp A Buechel, Ronny R
...
Published in
Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology
A reduction in left ventricular apical tracer uptake (apical thinning) is frequently observed in myocardial perfusion imaging (MPI), yet its cause remains a matter of debate, particularly in perfusion emission tomography (PET). This analysis sought to determine whether apical thinning in PET-MPI is attributable to true anatomical thinning of the le...
Fournier, Yvan
Computational fluid dynamics (CFD) computations often require coupling, interpolation, or projection of some values on one computational domain or portion thereof to another. This is the case both for multi-physics couplings, and for the implementation of various features, such as restarting on a different mesh, boundary condition couplings, and po...
Khachatryan, V. Sirunyan, A. M. Tumasyan, A. Adam, W. Asilar, E. Bergauer, T. Brandstetter, J. Brondolin, E. Dragicevic, M. Eroe, J.
...
Measurements are presented of the cross section for the production of at least four jets, of which at least two originate from b quarks, in proton-proton collisions. Data collected with the CMS detector at the LHC at a center-of-mass energy of 7 TeV are used, corresponding to an integrated luminosity of 3 pb(-1). The cross section is measured as a ...
rosenberg, duane mininni, pablo d. reddy, raghu pouquet, annick
An existing hybrid MPI-OpenMP scheme is augmented with a CUDA-based fine grain parallelization approach for multidimensional distributed Fourier transforms, in a well-characterized pseudospectral fluid turbulence code. Basics of the hybrid scheme are reviewed, and heuristics provided to show a potential benefit of the CUDA implementation. The metho...
