Search Results - "Nilsson, Markus"

Maxwell‐compensated design of asymmetric gradient waveforms for tensor‐valued diffusion encoding by Szczepankiewicz, Filip, Westin, Carl‐Fredrik, Nilsson, Markus

“…Purpose Diffusion encoding with asymmetric gradient waveforms is appealing because the asymmetry provides superior efficiency. However, concomitant gradients…”
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Tensor-valued diffusion encoding for diffusional variance decomposition (DIVIDE): Technical feasibility in clinical MRI systems by Szczepankiewicz, Filip, Sjölund, Jens, Ståhlberg, Freddy, Lätt, Jimmy, Nilsson, Markus

“…Microstructure imaging techniques based on tensor-valued diffusion encoding have gained popularity within the MRI research community. Unlike conventional…”
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Extrapolation-Based References Improve Motion and Eddy-Current Correction of High B-Value DWI Data: Application in Parkinson's Disease Dementia by Nilsson, Markus, Szczepankiewicz, Filip, van Westen, Danielle, Hansson, Oskar

“…Conventional motion and eddy-current correction, where each diffusion-weighted volume is registered to a non diffusion-weighted reference, suffers from poor…”
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The dot-compartment revealed? Diffusion MRI with ultra-strong gradients and spherical tensor encoding in the living human brain by Tax, Chantal M.W., Szczepankiewicz, Filip, Nilsson, Markus, Jones, Derek K.

“…The so-called “dot-compartment” is conjectured in diffusion MRI to represent small spherical spaces, such as cell bodies, in which the diffusion is restricted…”
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Q-space trajectory imaging for multidimensional diffusion MRI of the human brain by Westin, Carl-Fredrik, Knutsson, Hans, Pasternak, Ofer, Szczepankiewicz, Filip, Özarslan, Evren, van Westen, Danielle, Mattisson, Cecilia, Bogren, Mats, O'Donnell, Lauren J., Kubicki, Marek, Topgaard, Daniel, Nilsson, Markus

“…This work describes a new diffusion MR framework for imaging and modeling of microstructure that we call q-space trajectory imaging (QTI). The QTI framework…”
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Quantification of microscopic diffusion anisotropy disentangles effects of orientation dispersion from microstructure: Applications in healthy volunteers and in brain tumors by Szczepankiewicz, Filip, Lasič, Samo, van Westen, Danielle, Sundgren, Pia C., Englund, Elisabet, Westin, Carl-Fredrik, Ståhlberg, Freddy, Lätt, Jimmy, Topgaard, Daniel, Nilsson, Markus

“…The anisotropy of water diffusion in brain tissue is affected by both disease and development. This change can be detected using diffusion MRI and is often…”
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SPHERIOUSLY? The challenges of estimating sphere radius non-invasively in the human brain from diffusion MRI by Afzali, Maryam, Nilsson, Markus, Palombo, Marco, Jones, Derek K

“…The Soma and Neurite Density Imaging (SANDI) three-compartment model was recently proposed to disentangle cylindrical and spherical geometries, attributed to…”
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Time dependence in diffusion MRI predicts tissue outcome in ischemic stroke patients by Lampinen, Björn, Lätt, Jimmy, Wasselius, Johan, Westen, Danielle, Nilsson, Markus

“…Purpose Reperfusion therapy enables effective treatment of ischemic stroke presenting within 4–6 hours. However, tissue progression from ischemia to infarction…”
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Tensor‐valued diffusion MRI in under 3 minutes: an initial survey of microscopic anisotropy and tissue heterogeneity in intracranial tumors by Nilsson, Markus, Szczepankiewicz, Filip, Brabec, Jan, Taylor, Marie, Westin, Carl‐Fredrik, Golby, Alexandra, Westen, Danielle, Sundgren, Pia C.

“…Purpose To evaluate the feasibility of a 3‐minutes protocol for assessment of the microscopic anisotropy and tissue heterogeneity based on tensor‐valued…”
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Accuracy and precision in super-resolution MRI: Enabling spherical tensor diffusion encoding at ultra-high b-values and high resolution by Vis, Geraline, Nilsson, Markus, Westin, Carl-Fredrik, Szczepankiewicz, Filip

“…Diffusion MRI (dMRI) can probe the tissue microstructure but suffers from low signal-to-noise ratio (SNR) whenever high resolution is combined with high…”
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Noninvasive mapping of water diffusional exchange in the human brain using filter-exchange imaging by Nilsson, Markus, Lätt, Jimmy, van Westen, Danielle, Brockstedt, Sara, Lasič, Samo, Ståhlberg, Freddy, Topgaard, Daniel

“…We present the first in vivo application of the filter‐exchange imaging protocol for diffusion MRI. The protocol allows noninvasive mapping of the rate of…”
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Association Between Earliest Amyloid Uptake and Functional Connectivity in Cognitively Unimpaired Elderly by Hahn, Andreas, Strandberg, Tor O, Stomrud, Erik, Nilsson, Markus, van Westen, Danielle, Palmqvist, Sebastian, Ossenkoppele, Rik, Hansson, Oskar

“…Abstract Alterations in cognitive performance have been noted in nondemented subjects with elevated accumulation of amyloid-β (Aβ) fibrils. However, it is not…”
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Conventions and nomenclature for double diffusion encoding NMR and MRI by Shemesh, Noam, Jespersen, Sune N., Alexander, Daniel C., Cohen, Yoram, Drobnjak, Ivana, Dyrby, Tim B., Finsterbusch, Jurgen, Koch, Martin A., Kuder, Tristan, Laun, Fredrik, Lawrenz, Marco, Lundell, Henrik, Mitra, Partha P., Nilsson, Markus, Özarslan, Evren, Topgaard, Daniel, Westin, Carl-Fredrik

“…Stejskal and Tanner's ingenious pulsed field gradient design from 1965 has made diffusion NMR and MRI the mainstay of most studies seeking to resolve…”
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Diffusion MRI with free gradient waveforms on a high-performance gradient system: Probing restriction and exchange in the human brain by Chakwizira, Arthur, Zhu, Ante, Foo, Thomas, Westin, Carl-Fredrik, Szczepankiewicz, Filip, Nilsson, Markus

“…•Free waveforms are used to probe restriction and exchange in the human brain.•Time-dependence in grey matter is driven by both restriction and…”
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Plasma neurofilament light protein correlates with diffusion tensor imaging metrics in frontotemporal dementia by Spotorno, Nicola, Lindberg, Olof, Nilsson, Christer, Landqvist Waldö, Maria, van Westen, Danielle, Nilsson, Karin, Vestberg, Susanna, Englund, Elisabet, Zetterberg, Henrik, Blennow, Kaj, Lätt, Jimmy, Markus, Nilsson, Lars-Olof, Wahlund, Alexander, Santillo

“…Neurofilaments are structural components of neurons and are particularly abundant in highly myelinated axons. The levels of neurofilament light chain (NfL) in…”
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Neural networks for parameter estimation in microstructural MRI: Application to a diffusion-relaxation model of white matter by de Almeida Martins, João P., Nilsson, Markus, Lampinen, Björn, Palombo, Marco, While, Peter T., Westin, Carl-Fredrik, Szczepankiewicz, Filip

“…Specific features of white matter microstructure can be investigated by using biophysical models to interpret relaxation-diffusion MRI brain data. Although…”
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Optimal experimental design for filter exchange imaging: Apparent exchange rate measurements in the healthy brain and in intracranial tumors by Lampinen, Björn, Szczepankiewicz, Filip, Westen, Danielle, Englund, Elisabet, C Sundgren, Pia, Lätt, Jimmy, Ståhlberg, Freddy, Nilsson, Markus

“…Purpose Filter exchange imaging (FEXI) is sensitive to the rate of diffusional water exchange, which depends, eg, on the cell membrane permeability. The aim…”
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Quantification of microcirculatory parameters by joint analysis of flow-compensated and non-flow-compensated intravoxel incoherent motion (IVIM) data by Ahlgren, André, Knutsson, Linda, Wirestam, Ronnie, Nilsson, Markus, Ståhlberg, Freddy, Topgaard, Daniel, Lasič, Samo

“…The aim of this study was to improve the accuracy and precision of perfusion fraction and blood velocity dispersion estimates in intravoxel incoherent motion…”
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Improved fibre dispersion estimation using b-tensor encoding by Cottaar, Michiel, Szczepankiewicz, Filip, Bastiani, Matteo, Hernandez-Fernandez, Moises, Sotiropoulos, Stamatios N., Nilsson, Markus, Jbabdi, Saad

“…Measuring fibre dispersion in white matter with diffusion magnetic resonance imaging (MRI) is limited by an inherent degeneracy between fibre dispersion and…”
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Divergent functional connectivity changes associated with white matter hyperintensities by Santillo, Alexander F., Strandberg, Tor O., Reislev, Nina H., Nilsson, Markus, Stomrud, Erik, Spotorno, Nicola, van Westen, Danielle, Hansson, Oskar

“…•Damage to white matter tracts are associated with cognitive reduction.•This damage reduces the functional connectivity between brain areas.•This is also…”
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