With the growing number of cores and fast network like Infiniband, one of the keys to performance improvement in MPI applications is the ability to overlap CPU-bound computation with network communications. While this can be done manually, this is often a complex and error prone procedure. We propose an approach that allows MPI blocking communicati...
Published in Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology
The effect of incidental findings from coronary computed tomography angiography (CCTA) on management has not been rigorously investigated. This study uses a control group to explore this relationship. Analysis of data from a randomized controlled trial of acute chest pain patients admitted to telemetry was performed. Patients were randomized to und...
Published in Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology
The frequency of abnormal stress single-photon emission computed tomography myocardial perfusion imaging (MPS) has decreased over the past decades despite an increase in the prevalence of cardiovascular risk factors. This study evaluated the temporal trend of abnormal stress MPS and its relationship with risk factors in a cohort of Italian subjects...
Published in Molecular imaging and biology
Stem cell-based therapeutics is a rapidly developing field associated with a number of clinical challenges. One such challenge lies in the implementation of methods to track stem cells and stem cell-derived cells in experimental animal models and in the living patient. Here, we provide an overview of cell tracking in the context of cardiac and neur...
Published in Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology
Early MPI after CABG is currently considered rarely appropriate in asymptomatic patients. This study aimed to identify prognostic value of nuclear stress-imaging post-CABG. This was a single center prospective study looking at long-term outcomes post-CABG. Per protocol participants underwent SPECT-MPI stress testing and coronary angiogram on the sa...
Published in Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology
l’imagerie SPECT/CT permet la quantification de la réserve de perfusion régionale du muscle squelettique. Celle-ci est statistiquement et positivement associée à la tolérance à l’exercice et à la capacité cardiovasculaire. L’application future de SPECT/CT pourrait élucider les adaptations sous-jacentes des muscles squelettiques à la thérapie par l’...
Published in Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology
Our aim was to determine if end-stage liver disease (ESLD) is associated with an attenuated response to vasodilator-stress or dobutamine-stress using 82Rb-PET MPI with blood flow quantification. Pre-liver transplant patients who had a normal dipyridamole-stress (n = 27) or dobutamine-stress (n = 26) 82Rb PET/CT MPI study with no identifiable corona...
The Message Passing Interface (MPI) is a parallel programming model used to exchange data between working units in different nodes of a supercomputer. While MPI blocking operations return when the communication is complete, non-blocking and persistent operations return before the communication is complete, enabling a developer to hide communication...
Published in F1000Research
Life science has entered the so-called 'big data era' where biologists, clinicians and bioinformaticians are overwhelmed with high-throughput sequencing data. While they offer new insights to decipher the genome structure they also raise major challenges to use them for daily clinical practice care and diagnosis purposes as they are bigger and bigg...
We present experimental results for evaluating non-blocking MPI collectives. We compute several metrics to asses the efficiency of the overlap for different MPI library, with different configurations and for different hardware.
