Simple compensation method for improved half-pulse excitation
profile with rephasing gradient

J 2020

Simple compensation method for improved half-pulse excitation profile with rephasing gradient

LATTA, Peter, Z. STARCUK, Martin KOJAN, M.L.H. GRUWEL, B. TOMANEK et. al.

Základní údaje

Originální název

Simple compensation method for improved half-pulse excitation profile with rephasing gradient

Autoři

LATTA, Peter (703 Slovensko, garant, domácí), Z. STARCUK, Martin KOJAN (703 Slovensko, domácí), M.L.H. GRUWEL, B. TOMANEK, S. TRATTNIG a V. JURAS

Vydání

MAGNETIC RESONANCE IN MEDICINE, HOBOKEN, WILEY-BLACKWELL, 2020, 0740-3194

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

30103 Neurosciences

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 4.668

Kód RIV

RIV/00216224:14740/20:00116481

Organizační jednotka

Středoevropský technologický institut

DOI

http://dx.doi.org/10.1002/mrm.28233

UT WoS

000561641400001

Klíčová slova anglicky

eddy current correction; gradients; half-pulse excitation; UTE imaging

Štítky

CF MAFIL, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 24. 10. 2024 09:42, Mgr. Adéla Pešková

Anotace

V originále

Purpose To improve the slice profile quality obtained by RF half-pulse excitation for 2D-UTE applications. Methods The overall first-order and zero-order phase errors along the slice-selection direction were obtained with the help of an optimization task to minimize the out-of-slice signal contamination from the calibration 1-dimenisonal (1D) profile data. The time-phase-error evolution was approximated from the k-space readout data, which were acquired primarily for correction of the readout trajectories during data regridding to the rectilinear grids. The correction of the slice profile was achieved by rephasing gradient pulses applied immediately after the end of excitation. The total prescan calibration typically took less than 2 minutes. Results The improved image quality using the proposed calibration method was demonstrated both on phantoms and on ankle images obtained from healthy volunteers. It was demonstrated that calibration can be performed either as a separate water phantom measurement or directly as a prescan procedure. Conclusion The slice-profile distortion from the half-pulse excitation could substantially affect the overall fidelity of 2D-UTE images. The presented experiments proved that the image quality could be substantially increased by application of the proposed slice-correction method.

Návaznosti

LM2015062, projekt VaV

Název: Národní infrastruktura pro biologické a medicínské zobrazování

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, National research infrastructure for biological and medical imaging

LQ1601, projekt VaV

Název: CEITEC 2020 (Akronym: CEITEC2020)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, CEITEC 2020

Citovat

LATTA, Peter, Z. STARCUK, Martin KOJAN, M.L.H. GRUWEL, B. TOMANEK, S. TRATTNIG a V. JURAS. Simple compensation method for improved half-pulse excitation profile with rephasing gradient. MAGNETIC RESONANCE IN MEDICINE. HOBOKEN: WILEY-BLACKWELL, 2020, roč. 84, č. 4, s. 1796-1805. ISSN 0740-3194. Dostupné z: https://dx.doi.org/10.1002/mrm.28233.

@article{1680369,
   author = {Latta, Peter and Starcuk, Z. and Kojan, Martin and Gruwel, M.L.H. and Tomanek, B. and Trattnig, S. and Juras, V.},
   article_location = {HOBOKEN},
   article_number = {4},
   doi = {http://dx.doi.org/10.1002/mrm.28233},
   keywords = {eddy current correction; gradients; half-pulse excitation; UTE imaging},
   language = {eng},
   issn = {0740-3194},
   journal = {MAGNETIC RESONANCE IN MEDICINE},
   title = {Simple compensation method for improved half-pulse excitation profile with rephasing gradient},
   url = {https://onlinelibrary.wiley.com/doi/full/10.1002/mrm.28233},
   volume = {84},
   year = {2020}
}

TY  - JOUR
ID  - 1680369
AU  - Latta, Peter - Starcuk, Z. - Kojan, Martin - Gruwel, M.L.H. - Tomanek, B. - Trattnig, S. - Juras, V.
PY  - 2020
TI  - Simple compensation method for improved half-pulse excitation profile with rephasing gradient
JF  - MAGNETIC RESONANCE IN MEDICINE
VL  - 84
IS  - 4
SP  - 1796-1805
EP  - 1796-1805
PB  - WILEY-BLACKWELL
SN  - 07403194
KW  - eddy current correction
KW  - gradients
KW  - half-pulse excitation
KW  - UTE imaging
UR  - https://onlinelibrary.wiley.com/doi/full/10.1002/mrm.28233
L2  - https://onlinelibrary.wiley.com/doi/full/10.1002/mrm.28233
N2  - Purpose To improve the slice profile quality obtained by RF half-pulse excitation for 2D-UTE applications. Methods The overall first-order and zero-order phase errors along the slice-selection direction were obtained with the help of an optimization task to minimize the out-of-slice signal contamination from the calibration 1-dimenisonal (1D) profile data. The time-phase-error evolution was approximated from the k-space readout data, which were acquired primarily for correction of the readout trajectories during data regridding to the rectilinear grids. The correction of the slice profile was achieved by rephasing gradient pulses applied immediately after the end of excitation. The total prescan calibration typically took less than 2 minutes. Results The improved image quality using the proposed calibration method was demonstrated both on phantoms and on ankle images obtained from healthy volunteers. It was demonstrated that calibration can be performed either as a separate water phantom measurement or directly as a prescan procedure. Conclusion The slice-profile distortion from the half-pulse excitation could substantially affect the overall fidelity of 2D-UTE images. The presented experiments proved that the image quality could be substantially increased by application of the proposed slice-correction method.
ER  -

LATTA, Peter, Z. STARCUK, Martin KOJAN, M.L.H. GRUWEL, B. TOMANEK, S. TRATTNIG a V. JURAS. Simple compensation method for improved half-pulse excitation profile with rephasing gradient. \textit{MAGNETIC RESONANCE IN MEDICINE}. HOBOKEN: WILEY-BLACKWELL, 2020, roč.~84, č.~4, s.~1796-1805. ISSN~0740-3194. Dostupné z: https://dx.doi.org/10.1002/mrm.28233.

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