K-space trajectory mapping and its application for ultrashort
Echo time imaging

J 2017

K-space trajectory mapping and its application for ultrashort Echo time imaging

LATTA, Peter, Zenon STARCUK, Marco L. H. GRUWEL, Michael H. WEBER, Boguslaw TOMANEK et. al.

Základní údaje

Originální název

K-space trajectory mapping and its application for ultrashort Echo time imaging

Autoři

LATTA, Peter (703 Slovensko, garant, domácí), Zenon STARCUK (203 Česká republika), Marco L. H. GRUWEL (36 Austrálie), Michael H. WEBER (124 Kanada) a Boguslaw TOMANEK (616 Polsko, domácí)

Vydání

MAGNETIC RESONANCE IMAGING, NEW YORK, ELSEVIER SCIENCE INC, 2017, 0730-725X

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

20600 2.6 Medical engineering

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 2.564

Kód RIV

RIV/00216224:14740/17:00094674

Organizační jednotka

Středoevropský technologický institut

DOI

http://dx.doi.org/10.1016/j.mri.2016.10.012

UT WoS

000393536100010

Klíčová slova anglicky

Gradient imperfections; K-space deviation; Trajectory estimation; Ultrashort echo time (UTE)

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 23. 2. 2018 12:50, Mgr. Pavla Foltynová, Ph.D.

Anotace

V originále

MR images are affected by system delays and gradient field imperfections which induce discrepancies between prescribed and actual k-space trajectories. This could be even more critical for non-Cartesian data acquisitions where even a small deviation from the assumed k-space trajectory results in severe image degradation and artifacts. Knowledge of the actual k-space trajectories is therefore crucial and can be incorporated in the reconstruction of high quality non-Cartesian images. A novel MR method for the calibration of actual gradient waveforms was developed using a combination of phase encoding increments and subsequent detection of the exact time point at which the corresponding trajectory is crossing the k-space origin. The measured sets of points were fitted to a parametrical model to calculate the complete actual acquisition trajectory. Measurements performed on phantoms and volunteers, positioned both in- and off-isocenter of the magnet, clearly demonstrate the improvement in reconstructed ultrashort echo time (UTE) images, when information from calibration of k-space sampling trajectories is employed in the MR image reconstruction procedure. The unique feature of the proposed method is its robustness and simple experimental setup, making it suitable for quick acquisition trajectory calibration procedures e.g. for non-Cartesian radial fast imaging. (C) 2016 Elsevier Inc. All rights reserved.

Návaznosti

GA15-12607S, projekt VaV

Název: Návrh a optimalizace pulzních sekvenci s ultrakrátkým echо-časem pro spolehlivou detekci obsahu myelinu v lidském mozku pomocí MR zobrazování.

Investor: Grantová agentura ČR, Návrh a optimalizace pulzních sekvenci s ultrakrátkým echо-časem pro spolehlivou detekci obsahu myelinu v lidském mozku pomocí MR zobrazování

Citovat

LATTA, Peter, Zenon STARCUK, Marco L. H. GRUWEL, Michael H. WEBER a Boguslaw TOMANEK. K-space trajectory mapping and its application for ultrashort Echo time imaging. MAGNETIC RESONANCE IMAGING. NEW YORK: ELSEVIER SCIENCE INC, 2017, roč. 36, February, s. 68-76. ISSN 0730-725X. Dostupné z: https://dx.doi.org/10.1016/j.mri.2016.10.012.

@article{1375728,
   author = {Latta, Peter and Starcuk, Zenon and Gruwel, Marco L. H. and Weber, Michael H. and Tomanek, Boguslaw},
   article_location = {NEW YORK},
   article_number = {February},
   doi = {http://dx.doi.org/10.1016/j.mri.2016.10.012},
   keywords = {Gradient imperfections; K-space deviation; Trajectory estimation; Ultrashort echo time (UTE)},
   language = {eng},
   issn = {0730-725X},
   journal = {MAGNETIC RESONANCE IMAGING},
   title = {K-space trajectory mapping and its application for ultrashort Echo time imaging},
   url = {http://www.sciencedirect.com/science/article/pii/S0730725X1630159X},
   volume = {36},
   year = {2017}
}

TY  - JOUR
ID  - 1375728
AU  - Latta, Peter - Starcuk, Zenon - Gruwel, Marco L. H. - Weber, Michael H. - Tomanek, Boguslaw
PY  - 2017
TI  - K-space trajectory mapping and its application for ultrashort Echo time imaging
JF  - MAGNETIC RESONANCE IMAGING
VL  - 36
IS  - February
SP  - 68-76
EP  - 68-76
PB  - ELSEVIER SCIENCE INC
SN  - 0730725X
KW  - Gradient imperfections
KW  - K-space deviation
KW  - Trajectory estimation
KW  - Ultrashort echo time (UTE)
UR  - http://www.sciencedirect.com/science/article/pii/S0730725X1630159X
L2  - http://www.sciencedirect.com/science/article/pii/S0730725X1630159X
N2  - MR images are affected by system delays and gradient field imperfections which induce discrepancies between prescribed and actual k-space trajectories. This could be even more critical for non-Cartesian data acquisitions where even a small deviation from the assumed k-space trajectory results in severe image degradation and artifacts. Knowledge of the actual k-space trajectories is therefore crucial and can be incorporated in the reconstruction of high quality non-Cartesian images. A novel MR method for the calibration of actual gradient waveforms was developed using a combination of phase encoding increments and subsequent detection of the exact time point at which the corresponding trajectory is crossing the k-space origin. The measured sets of points were fitted to a parametrical model to calculate the complete actual acquisition trajectory. Measurements performed on phantoms and volunteers, positioned both in- and off-isocenter of the magnet, clearly demonstrate the improvement in reconstructed ultrashort echo time (UTE) images, when information from calibration of k-space sampling trajectories is employed in the MR image reconstruction procedure. The unique feature of the proposed method is its robustness and simple experimental setup, making it suitable for quick acquisition trajectory calibration procedures e.g. for non-Cartesian radial fast imaging. (C) 2016 Elsevier Inc. All rights reserved.
ER  -

LATTA, Peter, Zenon STARCUK, Marco L. H. GRUWEL, Michael H. WEBER a Boguslaw TOMANEK. K-space trajectory mapping and its application for ultrashort Echo time imaging. \textit{MAGNETIC RESONANCE IMAGING}. NEW YORK: ELSEVIER SCIENCE INC, 2017, roč.~36, February, s.~68-76. ISSN~0730-725X. Dostupné z: https://dx.doi.org/10.1016/j.mri.2016.10.012.

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