Now showing items 1-20 of 29

  • About assessing the learning of students with dyscalculia 

    García Planas, María Isabel; García-Camba Vives, María Victoria (2019)
    Conference report
    Open Access
    Dyscalculia is a neurodevelopmental disorder that affects to the capacity for calculation, interfering with the academic performance, the level of social inclusion, the access to the working world, and especially in the ...
  • A MAP approach for convex non-negative matrix factorization in the diagnosis of brain tumors 

    Vilamala Muñoz, Albert; Belanche Muñoz, Luis Antonio; Vellido Alcacena, Alfredo (2014)
    Conference report
    Restricted access - publisher's policy
    Convex non-negative matrix factorization is a blind signal separation technique that has previously demonstrated to be well-suited for the task of human brain tumor diagnosis from magnetic resonance spectroscopy data. This ...
  • Application of a Mamdani-type fuzzy rule-based system to segment periventricular cerebral veins in susceptibility-weighted images 

    Aymerich Martínez, Francisco Javier; Sobrevilla Frisón, Pilar; Montseny Masip, Eduard; Rovira, Alex (Springer, 2016)
    Conference report
    Open Access
    This paper presents an algorithm designed to segment veins in the periventricular region of the brain in susceptibility-weighted magnetic resonance images. The proposed algorithm is based on a Mamdani-type fuzzy rule-based ...
  • Automatic BSS-based filtering of metallic interference in MEG recordings: definition and validation using simulated signals 

    Migliorelli Falcone, Carolina Mercedes; Alonso López, Joan Francesc; Romero Lafuente, Sergio; Mañanas Villanueva, Miguel Ángel; Nowak, Rafal; Russi Tintoré, Antonio (2015-05-27)
    Article
    Open Access
    Objective. One of the principal drawbacks of magnetoencephalography (MEG) is its high sensitivity to metallic artifacts, which come from implanted intracranial electrodes and dental ferromagnetic prosthesis and produce a ...
  • Benchmark on automatic 6-month-old infant brain segmentation algorithms: the iSeg-2017 challenge 

    Wang, Li; Nie, Dong; Li, Guannan; Casamitjana Díaz, Adrià; Vilaplana Besler, Verónica (2019-02-27)
    Article
    Open Access
    Accurate segmentation of infant brain magnetic resonance (MR) images into white matter (WM), gray matter (GM), and cerebrospinal fluid (CSF) is an indispensable foundation for early studying of brain growth patterns and ...
  • Biological tissue characterization by magnetic induction spectroscopy (MIS): requirements and limitations 

    Scharfetter, Hermann; Casañas Bueno, Roberto; Rosell Ferrer, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-07-31)
    Article
    Open Access
    Magnetic induction spectroscopy (MIS) aims at the contactless measurement of the passive electrical properties (PEP) σ, ε, and μ of biological tissues via magnetic fields at multiple frequencies. Whereas previous publications ...
  • Characteristic brain volumetric changes in the AD preclinical signature 

    Petrone, Paula; Casamitjana Díaz, Adrià; Falcón, Carlos; Artigues, Miquel; Operto, Grégory; Skouras, Stavros; Cacciaglia, Raffaele; Molinuevo, Jose Luis; Vilaplana Besler, Verónica; Gispert, Juan Domingo; Salvado, Gemma (Elsevier, 2018)
    Article
    Open Access
  • Classification, dimensionality reduction, and maximally discriminatory visualization of a multicentre 1H-MRS database of brain tumors 

    Lisboa, Paulo J.G.; Romero Merino, Enrique; Vellido Alcacena, Alfredo; Julià Sapé, Margarida; Arús, Carles (IEEE, 2008)
    Conference report
    Open Access
    The combination of an Artificial Neural Network classifier, a feature selection process, and a novel linear dimensionality reduction technique that provides a data projection for visualization and which preserves completely ...
  • Collective excitability in a mesoscopic neuronal model of epileptic activity 

    Jedynak, Maciej; Pons Rivero, Antonio Javier; García Ojalvo, Jordi (2018-01-12)
    Article
    Open Access
    At the mesoscopic scale, the brain can be understood as a collection of interacting neuronal oscillators, but the extent to which its sustained activity is due to coupling among brain areas is still unclear. Herewe address ...
  • Comparison between gadolinium-enhanced 2D T1-weighted gradient-echo and spin-echo sequences in the detection of active multiple sclerosis lesions on 3.0T MRI 

    Aymerich Martínez, Francisco Javier; Auger, Cristina; Alcaide, Paula; Pareto Onghena, Deborah; Huerga, Elena; Corral Gámez, Juan Francisco; Mitjana, Raquel; Sastre Garriga, Jaume; Montalban, Xavier; Rovira, Alex (2017-04-01)
    Article
    Open Access
    Objectives To compare the sensitivity of enhancing multiple sclerosis (MS) lesions in gadolinium-enhanced 2D T1-weighted gradient-echo (GRE) and spin-echo (SE) sequences, and to assess the influence of visual conspicuity ...
  • Complex temporal patterns processing by a neural mass model of a cortical column 

    Malagarriga, Daniel; Pons Rivero, Antonio Javier; Villa, Alejandro E. P. (2019-04-06)
    Article
    Restricted access - publisher's policy
    It is well known that neuronal networks are capable of transmitting complex spatiotemporal information in the form of precise sequences of neuronal discharges characterized by recurrent patterns. At the same time, the ...
  • Cross-frequency transfer in a stochastically driven mesoscopic neuronal model 

    Jedynak, Maciej; Pons Rivero, Antonio Javier; García Ojalvo, Jordi (2015-02-16)
    Article
    Open Access
    The brain is known to operate in multiple coexisting frequency bands. Increasing experimental evidence suggests that interactions between those distinct bands play a crucial role in brain processes, but the dynamical ...
  • Detección de eventos transitorios en señales de origen cerebral 

    Argüelles Mallén, Esther (Universitat Politècnica de Catalunya, 2015-06-09)
    Bachelor thesis
    Restricted access - author's decision
    En el present projecte es realitza el disseny d’un nou algoritme capaç de detectar automàticament esdeveniments transitoris presents en senyals d’origen cerebral, obtinguts mitjançant el registre electroencefalogràfic ...
  • Differential neuronal and glial behavior on flat and micro patterned chitosan films 

    Mattotti, Marta; Álvarez Pinto, Zaída; Delgado Muñoz, Luis; Mateos Timoneda, Miguel Ángel; Aparicio, Conrado; Planell Estany, Josep Anton; Alcántara Horrillo, Soledad; Engel López, Elisabeth (2017-10-01)
    Article
    Open Access
    Chitosan is a biodegradable natural polysaccharide that has been widely studied for regenerative purposes in the central nervous system. In this study we assessed the in vitro glial and neuronal cells response to chitosan ...
  • Differentiating resting brain states using ordinal symbolic analysis 

    Quintero Quiroz, Carlos Alberto; Montesano Del Campo, Luis; Pons Rivero, Antonio Javier; Torrent Serra, Maria del Carmen; García Ojalvo, Jordi; Masoller Alonso, Cristina (Institute of Physics (IOP), 2018-10-08)
    Article
    Open Access
    Symbolic methods of analysis are valuable tools for investigating complex time-dependent signals. In particular, the ordinal method defines sequences of symbols according to the ordering in which values appear in a time ...
  • Entropy measures as descriptors to identify apneas in rheoencephalographic signals 

    González Pijuán, Carmen; Jensen, Erik Weber; Gambus, Pedro L.; Vallverdú Ferrer, Montserrat (2019-06-18)
    Article
    Open Access
    Rheoencephalography (REG) is a simple and inexpensive technique that intends to monitor cerebral blood flow (CBF), but its ability to reflect CBF changes has not been extensively proved. Based on the hypothesis that ...
  • Estudio de la conectividad cerebral mediante transferencia de entropía 

    Alcalá Álvarez, Marta (Universitat Politècnica de Catalunya, 2014-06-11)
    Bachelor thesis
    Open Access
    En el present treball s’estudien els efectes de la privació del son sobre senyals electroencefalogràfics de voluntaris sans mitjançant la transferència d'entropia (TE), una tècnica de teoria de la informació que permet ...
  • G protein-coupled receptor heterodimerization in the brain 

    Borroto Escuela, Dasiel Óscar; Romero Fernandez, Wilber; Garriga Solé, Pere; Ciruela, Francisco; Narvaez, Manuel; Tarakanov, O.V.; Palkovits, Miklós; Agnati, Luigi F.; Fuxe, Kjell (2013)
    Article
    Restricted access - publisher's policy
    G protein-coupled receptors (GPCRs) play critical roles in cellular processes and signaling and have been shown to form heteromers with diverge biochemical and/or pharmacological activities that are different from those ...
  • Improvements in the registration of multimodal medical imaging : application to intensity inhomogeneity and partial volume corrections 

    Jiménez González, Xavier (Universitat Politècnica de Catalunya, 2016-12-23)
    Doctoral thesis
    Open Access
    Alignment or registration of medical images has a relevant role on clinical diagnostic and treatment decisions as well as in research settings. With the advent of new technologies for multimodal imaging, robust registration ...
  • Large-scale machine learning in cancer and brain research: new applications that will drive future supercomputing systems 

    Stevens, Rick (Barcelona Supercomputing Center, 2016-09-10)
    Conference report
    Open Access
    In this talk I’ll discuss the DOE/NCI cancer research co-design projects that are a key part of the Presidential Moonshot Cancer Initiative and the brain connectome project at the heart of the National Brain Observatory ...