Now showing items 1-20 of 40

    • 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 ...
    • A Statistical Atlas of Anatomical Structures from Brain ToF MRA Datasets 

      Faura Pinent, Judit (Universitat Politècnica de Catalunya, 2020-10-31)
      Bachelor thesis
      Open Access
      Covenantee:   Instituto Politecnico do Porto
      L’angiografia per ressonància magnètica (MRA) és capaç de capturar variacions en les artèries cerebrals, ja siguin morfològiques, geomètriques o de densitat, amb alta resolució. Aquestes variacions s'utilitzen per a ...
    • A study of brain connectivity in ADHD patients 

      Izquierdo Antó, Gerard (Universitat Politècnica de Catalunya, 2020-10-31)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   Politecnico di Torino
      El Trastorn per dèficit d’atenció i hiperactivitat (TDAH), tal com el seu nom indica, és un trastorn vinculat tant a la hiperactivitat com a la dificultat d’atenció que afecta principalment a infants, però també a adults, ...
    • 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 ...
    • 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
    • Characterization of brain development in preterm children using ultrasound images 

      Rabanaque Rodríguez, David (Universitat Politècnica de Catalunya, 2021-10-27)
      Master thesis
      Open Access
      El període més important per al desenvolupament del cervell humà és la fase fetal. Durant aquest període de quaranta setmanes, es produeixen canvis morfològics importants al cervell humà, incloent un enorme augment de la ...
    • Chronological brain lesions after SARS-CoV-2 infection in hACE2-transgenic mice 

      Vidal, Enric; López Figueroa, Carlos; Rodon, Jordi; Pérez, Mónica; Brustolin, Marco; Guallar, Victor (SAGE Publications, 2021-12)
      Article
      Open Access
      Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes respiratory disease, but it can also affect other organs including the central nervous system. Several animal models have been developed to address different ...
    • 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
      Open Access
      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 ...