Výsledky vyhledávání - "Gradient impulse response function"

Dissertation/ Thesis

Correction of Radial Sampling Trajectories by Modeling Nominal Gradient Waveforms and Convolving with Gradient Impulse Response Function

Autor: Kim, Max, Belbaisi, Adham

There are several reasons for using non-Cartesian k-space sampling methods in Magnetic Resonance Imaging (MRI). Such a method is radial sampling, which includes the advantage of continuous coverage of the k-space center which results in higher robust

Externí odkaz: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254347

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MaxGIRF: Image reconstruction incorporating concomitant field and gradient impulse response function effects

Autor: Nam G. Lee, Rajiv Ramasawmy, Yongwan Lim, Adrienne E. Campbell‐Washburn, Krishna S. Nayak

Publikováno v: Magnetic resonance in medicine. 88(2)

To develop and evaluate an improved strategy for compensating concomitant field effects in non-Cartesian MRI at the time of image reconstruction.We present a higher-order reconstruction method, denoted as MaxGIRF, for non-Cartesian imaging that simul

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d2af20ac0b7c23849c101e5e43264f27
https://pubmed.ncbi.nlm.nih.gov/35445768

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Trajectory correction based on the gradient impulse response function improves high-resolution UTE imaging of the musculoskeletal system

Autor: Dimitrios C. Karampinos, Peter Börnert, Jürgen Rahmer, Benedikt J. Schwaiger, Alexandra S. Gersing, Marcus R. Makowski, Sophia Kronthaler

Publikováno v: Magnetic Resonance in Medicine

Purpose UTE sequences typically acquire data during the ramping up of the gradient fields, which makes UTE imaging prone to eddy current and system delay effects. The purpose of this work was to use a simple gradient impulse response function (GIRF)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f28cab30ee5b8566eb5ad8aec398e2d9
https://pubmed.ncbi.nlm.nih.gov/33251655

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Akademický článek

Trajectory correction enables free-running chemical shift encoded imaging for accurate cardiac proton-density fat fraction quantification at 3T

Autor: Pierre Daudé, Thomas Troalen, Adèle L.C. Mackowiak, Emilien Royer, Davide Piccini, Jérôme Yerly, Josef Pfeuffer, Frank Kober, Sylviane Confort Gouny, Monique Bernard, Matthias Stuber, Jessica A.M. Bastiaansen, Stanislas Rapacchi

Publikováno v: Journal of Cardiovascular Magnetic Resonance, Vol 26, Iss 2, Pp 101048- (2024)

ABSTRACT: Background: Metabolic diseases can negatively alter epicardial fat accumulation and composition, which can be probed using quantitative cardiac chemical shift encoded (CSE) cardiovascular magnetic resonance (CMR) by mapping proton-density f

Externí odkaz: https://doaj.org/article/706e0cb319fb42a685e0db8be40c5334

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Rapid acquisition of the 3D MRI gradient impulse response function using a simple phantom measurement

Autor: Peter Mazurkewitz, Peter Börnert, Jürgen Rahmer, Tim Nielsen

Publikováno v: Magnetic resonance in medicineREFERENCES. 82(6)

Purpose To provide a simple tool for rapid measurement of the 3D gradient modulation transfer function (GMTF) of clinical MRI systems using a phantom. Knowledge of the transfer function is useful for gradient chain characterization, system calibratio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c39c92c7bec9c93d5bf194c2e9a0bdb6
https://pubmed.ncbi.nlm.nih.gov/31321818

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