Zobrazeno 1 - 10
of 111
pro vyhledávání: '"Kristian Bredies"'
Publikováno v:
International Journal of Prognostics and Health Management, Vol 15, Iss 2 (2024)
The identification of railway vehicle components’ characteristics from measured data is a challenging task with compelling applications in health monitoring, fault detection, and system prognosis. Usually, though, such systems are highly nonlinear,
Externí odkaz:
https://doaj.org/article/81fddbb55806431db543a85cc25cfad2
Autor:
Stefan M. Spann, Xingfeng Shao, Danny JJ. Wang, Christoph S. Aigner, Matthias Schloegl, Kristian Bredies, Rudolf Stollberger
Publikováno v:
NeuroImage, Vol 206, Iss , Pp 116337- (2020)
For ASL perfusion imaging in clinical settings the current guidelines recommends pseudo-continuous arterial spin labeling with segmented 3D readout. This combination achieves the best signal to noise ratio with reasonable resolution but is prone to m
Externí odkaz:
https://doaj.org/article/c04c4b6f65d3449d86e0ef02a122dfb5
Autor:
Stefan M. Spann, Kamil S. Kazimierski, Christoph S. Aigner, Markus Kraiger, Kristian Bredies, Rudolf Stollberger
Publikováno v:
NeuroImage, Vol 157, Iss , Pp 81-96 (2017)
In arterial spin labeling (ASL) a perfusion weighted image is achieved by subtracting a label image from a control image. This perfusion weighted image has an intrinsically low signal to noise ratio and numerous measurements are required to achieve r
Externí odkaz:
https://doaj.org/article/43400f7cc7774579bc4a150f3c8d8315
Autor:
Anna Pukaluk, Anna-Sophie Wittgenstein, Gerd Leitinger, Dagmar Kolb, Dominique Pernitsch, Sarah A. Schneider, Patrick Knöbelreiter, Verena Horak, Kristian Bredies, Gerhard A. Holzapfel, Thomas Pock, Gerhard Sommer
Publikováno v:
Acta Biomaterialia. 141:300-314
An insight into changes of soft biological tissue ultrastructures under loading conditions is essential to understand their response to mechanical stimuli. Therefore, this study offers an approach to investigate the arrangement of collagen fibrils an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bb88e23a63957b92581373640834552
https://doi.org/10.1016/j.actbio.2022.01.036
https://doi.org/10.1016/j.actbio.2022.01.036
Publikováno v:
Inverse problems, 38(10):105006. IOP Publishing Ltd.
We introduce and study a mathematical framework for a broad class of regularization functionals for ill-posed inverse problems: regularization graphs. Regularization graphs allow to construct functionals using as building blocks linear operators and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29d5ad22e042083b92ee3e5ab462b709
https://research.utwente.nl/en/publications/02d33dfb-d22e-41e7-85cb-28169e536bd9
https://research.utwente.nl/en/publications/02d33dfb-d22e-41e7-85cb-28169e536bd9
Autor:
Kristian Bredies, Mathias Lambert, Christian Langkammer, Pablo Irarrazaval, Cristian Tejos, Carlos Milovic
Publikováno v:
Magnetic resonance in medicineREFERENCES. 87(1)
Purpose: The presence of dipole-inconsistent data due to substantial noise or artifacts causes streaking artifacts in quantitative susceptibility mapping (QSM) reconstructions. Often used Bayesian approaches rely on regularizers, which in turn yield
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d88cab01bdc94a6b5ea6b9027eade5e
https://pubmed.ncbi.nlm.nih.gov/34350634
https://pubmed.ncbi.nlm.nih.gov/34350634
We develop a dynamic generalized conditional gradient method (DGCG) for dynamic inverse problems with optimal transport regularization. We consider the framework introduced in (Bredies and Fanzon, ESAIM: M2AN, 54:2351-2382, 2020), where the objective
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf1146836a3fcd5792bc5a5d8b832dfa
http://arxiv.org/abs/2012.11706
http://arxiv.org/abs/2012.11706
Autor:
Thomas Gattringer, Rudolf Stollberger, Christian Enzinger, Kristian Bredies, Oliver Maier, Daniela Pinter, Gerhard G. Thallinger, Stefan Manfred Spann, Josef Pfeuffer, Nicole Hinteregger
Publikováno v:
Medical image analysis. 71
Multi-Delay single-shot arterial spin labeling (ASL) imaging provides accurate cerebral blood flow (CBF) and, in addition, arterial transit time (ATT) maps but the inherent low SNR can be challenging. Especially standard fitting using non-linear leas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d201c94117c23bec7f3228ef25285f6b
https://pubmed.ncbi.nlm.nih.gov/33930830
https://pubmed.ncbi.nlm.nih.gov/33930830
Autor:
Richard Huber, Kristian Bredies
This paper presents a novel mathematical framework for understanding pixel-driven approaches for the parallel beam Radon transform as well as for the fanbeam transform, showing that with the correct discretization strategy, convergence - including ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b710a4abefdc146ea977240f272e7315
http://arxiv.org/abs/2004.02027
http://arxiv.org/abs/2004.02027
Autor:
Gernot Reishofer, Günther Grabner, Kristian Bredies, René Schranzer, Evelin Haimburger, Alexander Rauscher
Publikováno v:
Zeitschrift für Medizinische Physik. 28:286-292
Purpose Multiplication of FLAIR and T2-weighted MRI scans results in images (called FLAIR2) with an improved contrast-to-noise ratio (CNR) for multiple sclerosis (MS) lesions but with a reduced signal-to-noise ratio (SNR). Denoising of these images m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a315abfa8e0a6045636820f77f84786
https://doi.org/10.1016/j.zemedi.2017.11.001
https://doi.org/10.1016/j.zemedi.2017.11.001