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.

Basic information

Original name

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

Authors

LATTA, Peter (703 Slovakia, guarantor, belonging to the institution), Zenon STARCUK (203 Czech Republic), Marco L. H. GRUWEL (36 Australia), Michael H. WEBER (124 Canada) and Boguslaw TOMANEK (616 Poland, belonging to the institution)

Edition

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

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

20600 2.6 Medical engineering

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 2.564

RIV identification code

RIV/00216224:14740/17:00094674

Organization unit

Central European Institute of Technology

DOI

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

UT WoS

000393536100010

Keywords in English

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

Abstract

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.

Links

GA15-12607S, research and development project

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

Investor: Czech Science Foundation

Citovat

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

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