Sampsa Pursiainen

37 papers Journal 37
YearRankTypeTitle / Venue / Authors
2025 J jnl
A Complete-Electrode-Model-Based Forward Approach for Transcranial Temporal Interference Stimulation with Linearization: Numerical Simulation Study.
CoRR
Santtu Söderholm, Maryam Samavaki, Sampsa Pursiainen
2025 J jnl
A coupled diffusion approximation for spatiotemporal hemodynamic response and deoxygenated blood volume fraction in microcirculation.
Biomed. Signal Process. Control.
Maryam Samavaki, Santtu Söderholm, Arash Zarrin Nia, Sampsa Pursiainen
2025 J jnl
Anomaly Distinguishability in an Asteroid Analogue Using Quasi-Monostatic Experimental Radar Measurements.
IEEE Trans. Computational Imaging
Yusuf Oluwatoki Yusuf, Astrid Dufaure, Liisa-Ida Sorsa, Christelle Eyraud, Jean-Michel Geffrin, Alain Herique, Sampsa Pursiainen
2025 J jnl
Balancing Intensity and Focality in Directional DBS Under Uncertainty: A Simulation Study of Electrode Optimization via a Metaheuristic L1L1 Approach.
CoRR
Fernando Galaz Prieto, Antti Lassila, Maryam Samavaki, Sampsa Pursiainen
2025 J jnl
The Effect of Prior Parameters on Standardized Kalman Filter-Based EEG Source Localization.
CoRR
Dilshanie Prasikala, Joonas Lahtinen, Alexandra Koulouri, Sampsa Pursiainen
2025 J jnl
The Local Subtraction Approach for EEG and MEG Forward Modeling.
SIAM J. Sci. Comput.
Malte B. Höltershinken, Pia Lange, Tim Erdbrügger, Yvonne Buschermöhle, Fabrice Wallois, Alena Buyx, Sampsa Pursiainen, Johannes Vorwerk, Christian Engwer, Carsten H. Wolters
2025 J jnl
Tracking EEG Thalamic and Cortical Focal Brain Activity using Standardized Kalman Filtering with Kinematics Modeling.
CoRR
Veikka Piispa, Dilshanie Prasikala, Joonas Lahtinen, Alexandra Koulouri, Sampsa Pursiainen
2024 J jnl
A Coupled Diffusion Approximation for Spatiotemporal Hemodynamic Response and Deoxygenated Blood Volume Fraction in Microcirculation.
CoRR
Maryam Samavaki, Santtu Söderholm, Arash Zarrin Nia, Sampsa Pursiainen
2024 J jnl
Anomaly distinguishability in an asteroid analogue using quasi-monostatic experimental radar measurements.
CoRR
Yusuf Oluwatoki Yusuf, Astrid Dufaure, Liisa-Ida Sorsa, Christelle Eyraud, Jean-Michel Geffrin, Alain Herique, Sampsa Pursiainen
2024 J jnl
Effects of source space resolution, randomization and averaging in focal EEG source localization: Estimation of forward and inverse errors.
J. Comput. Appl. Math.
Joonas Lahtinen, Atena Rezaei, Sampsa Pursiainen
2024 J jnl
Modeling of blood flow in cerebral arterial circulation and its dynamic impact on electrical conductivity in a realistic multi-compartment head model.
Comput. Methods Programs Biomed.
Maryam Samavaki, Santtu Söderholm, Arash Zarrin Nia, Sampsa Pursiainen
2024 J jnl
The effects of peeling on finite element method -based EEG source reconstruction.
Biomed. Signal Process. Control.
Santtu Söderholm, Joonas Lahtinen, Carsten H. Wolters, Sampsa Pursiainen
2023 J jnl
Pressure-Poisson equation in numerical simulation of cerebral arterial circulation and its effect on the electrical conductivity of the brain.
Comput. Methods Programs Biomed.
Maryam Samavaki, Yusuf Oluwatoki Yusuf, Arash Zarrin Nia, Santtu Söderholm, Joonas Lahtinen, Fernando Galaz Prieto, Sampsa Pursiainen
2023 J jnl
The Effects of Peeling on Finite Element Method -based EEG Source Reconstruction.
CoRR
Santtu Söderholm, Joonas Lahtinen, Carsten H. Wolters, Sampsa Pursiainen
2023 J jnl
The Localized Subtraction Approach For EEG and MEG Forward Modeling.
CoRR
Malte B. Höltershinken, Pia Lange, Tim Erdbrügger, Yvonne Buschermöhle, Fabrice Wallois, Alena Buyx, Sampsa Pursiainen, Johannes Vorwerk, Christian Engwer, Carsten H. Wolters
2022 J jnl
Conditionally Exponential Prior in Focal Near- and Far-Field EEG Source Localization via Randomized Multiresolution Scanning (RAMUS).
J. Math. Imaging Vis.
Joonas Lahtinen, Alexandra Koulouri, Atena Rezaei, Sampsa Pursiainen
2022 J jnl
CutFEM forward modeling for EEG source analysis.
CoRR
Tim Erdbrügger, Andreas Westhoff, Malte Hoeltershinken, Jan-Ole Radecke, Yvonne Buschermoehle, Alena Buyx, Fabrice Wallois, Sampsa Pursiainen, Joachim Gross, Rebekka Lencer, Christian Engwer, Carsten H. Wolters
2022 J jnl
Highly Adaptive and Automated Tetrahedral Mesh Generator for Multi-Compartment Human Head Model with Deep Brain Structures in EEG.
CoRR
Fernando Galaz Prieto, Joonas Lahtinen, Yusuf Oluwatoki Yusuf, Atena Rezaei, Sampsa Pursiainen
2022 J jnl
L1-norm vs. L2-norm fitting in optimizing focal multi-channel tES stimulation: linear and semidefinite programming vs. weighted least squares.
Comput. Methods Programs Biomed.
Fernando Galaz Prieto, Atena Rezaei, Maryam Samavaki, Sampsa Pursiainen
2022 J jnl
L1-norm vs. L2-norm fitting in optimizing focal multi-channel tES stimulation: linear and semidefinite programming vs. weighted least squares.
CoRR
Fernando Galaz Prieto, Atena Rezaei, Maryam Samavaki, Sampsa Pursiainen
2021 J jnl
An extended application 'Brain Q' processing EEG and MEG data of finger stimulation extended from 'Zeffiro' based on machine learning and signal processing.
Cogn. Syst. Res.
Qin He, Sampsa Pursiainen
2021 J jnl
Conditionally Exponential Prior in Focal Near- and Far-Field EEG Source Localization via Randomized Multiresolution Scanning (RAMUS).
CoRR
Joonas Lahtinen, Alexandra Koulouri, Atena Rezaei, Sampsa Pursiainen
2021 J jnl
Reconstructing subcortical and cortical somatosensory activity via the RAMUS inverse source analysis technique using median nerve SEP data.
NeuroImage
Atena Rezaei, Joonas Lahtinen, Frank Neugebauer, Marios Antonakakis, Maria Carla Piastra, Alexandra Koulouri, Carsten H. Wolters, Sampsa Pursiainen
2020 J jnl
A Time-Domain Multigrid Solver With Higher-Order Born Approximation for Full-Wave Radar Tomography of a Complex-Shaped Target.
IEEE Trans. Computational Imaging
Liisa-Ida Sorsa, Mika Takala, Christelle Eyraud, Sampsa Pursiainen
2020 J jnl
Randomized Multiresolution Scanning in Focal and Fast E/MEG Sensing of Brain Activity with a Variable Depth.
CoRR
Atena Rezaei, Alexandra Koulouri, Sampsa Pursiainen
2020 J jnl
Zeffiro User Interface for Electromagnetic Brain Imaging: a GPU Accelerated FEM Tool for Forward and Inverse Computations in Matlab.
Neuroinformatics
Qin He, Atena Rezaei, Sampsa Pursiainen
2019 J jnl
A realistic, accurate and fast source modeling approach for the EEG forward problem.
NeuroImage
Tuuli Miinalainen, Atena Rezaei, Defne Us, Andreas Nüßing, Christian Engwer, Carsten H. Wolters, Sampsa Pursiainen
2019 J jnl
Far-Field Inversion for the Deep Interior Scanning CubeSat.
IEEE Trans. Aerosp. Electron. Syst.
Mika Takala, Patrick Bambach, Jakob Deller, Esa Vilenius, Manfred Wittig, Harald Lentz, Hans Martin Braun, Mikko Kaasalainen, Sampsa Pursiainen
2019 J jnl
duneuro - A software toolbox for forward modeling in neuroscience.
CoRR
Andreas Nüßing, Maria Carla Piastra, Sophie Schrader, Tuuli Miinalainen, Sampsa Pursiainen, Heinrich Brinck, Carsten H. Wolters, Christian Engwer
2018 J jnl
Multigrid-Based Inversion for Volumetric Radar Imaging With Asteroid Interior Reconstruction as a Potential Application.
IEEE Trans. Computational Imaging
Mika Takala, Defne Us, Sampsa Pursiainen
2018 J jnl
Zeffiro user interface for electromagnetic brain imaging: a GPU accelerated FEM tool for forward and inverse computations in Matlab.
CoRR
Qin He, Atena Rezaei, Sampsa Pursiainen
2017 J jnl
A Mixed Finite Element Method to Solve the EEG Forward Problem.
IEEE Trans. Medical Imaging
Johannes Vorwerk, Christian Engwer, Sampsa Pursiainen, Carsten H. Wolters
2017 J jnl
The Effect of Hardware-Computed Travel Time on Localization Accuracy in the Inversion of Experimental (Acoustic) Waveform Data.
IEEE Trans. Computational Imaging
Mika Takala, Timo D. Hämäläinen, Sampsa Pursiainen
2016 J jnl
Orbiter-to-orbiter tomography: a potential approach for small solar system bodies.
IEEE Trans. Aerosp. Electron. Syst.
Sampsa Pursiainen, Mikko Kaasalainen
2015 J jnl
Comparison Study for Whitney (Raviart-Thomas)-Type Source Models in Finite-Element-Method-Based EEG Forward Modeling.
IEEE Trans. Biomed. Eng.
Martin Bauer, Sampsa Pursiainen, Johannes Vorwerk, Harald Köstler, Carsten H. Wolters
2012 J jnl
Hierarchical Bayesian inference for the EEG inverse problem using realistic FE head models: Depth localization and source separation for focal primary currents.
NeuroImage
Felix Lucka, Sampsa Pursiainen, Martin Burger, Carsten H. Wolters
2009 J jnl
Conditionally Gaussian Hypermodels for Cerebral Source Localization.
SIAM J. Imaging Sci.
Daniela Calvetti, Harri Hakula, Sampsa Pursiainen, Erkki Somersalo