Influence of k-space trajectory corrections on proton density
mapping with ultrashort echo time imaging: Application for
imaging of short T2 components in white matter

J 2018

Influence of k-space trajectory corrections on proton density mapping with ultrashort echo time imaging: Application for imaging of short T2 components in white matter

LATTA, Peter, Z. STARCUK, M.L.H. GRUWEL, Barbora LATTOVA, Petra LATTOVA et. al.

Základní údaje

Originální název

Influence of k-space trajectory corrections on proton density mapping with ultrashort echo time imaging: Application for imaging of short T2 components in white matter

Autoři

LATTA, Peter (703 Slovensko, garant, domácí), Z. STARCUK (203 Česká republika), M.L.H. GRUWEL (36 Austrálie), Barbora LATTOVA (124 Kanada, domácí), Petra LATTOVA (124 Kanada, domácí), Pavel ŠTOURAČ (203 Česká republika, domácí) a Boguslaw TOMANEK (616 Polsko, domácí)

Vydání

MAGNETIC RESONANCE IMAGING, NEW YORK, ELSEVIER SCIENCE INC, 2018, 0730-725X

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

30224 Radiology, nuclear medicine and medical imaging

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 2.112

Kód RIV

RIV/00216224:14740/18:00101216

Organizační jednotka

Středoevropský technologický institut

DOI

http://dx.doi.org/10.1016/j.mri.2018.04.020

UT WoS

000437819200012

Klíčová slova anglicky

Ultrashort T2; Gradient system imperfections; Ultrashort echo time (UTE); Quantitative MRI

Štítky

CF MAFIL, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 13. 3. 2019 13:35, Mgr. Pavla Foltynová, Ph.D.

Anotace

V originále

Purpose: To evaluate the impact of MR gradient system imperfections and limitations for the quantitative mapping of short T2* signals performed by ultrashort echo time (UTE) acquisition approach. Materials and methods: The measurement of short T2* signals from a phantom and a healthy volunteer study (8 subjects of average age 28 4 years) were performed on a 3T scanner. The characteristics of the gradient system were obtained using calibration method performed directly on the measured subject or phantom. This information was used to calculate the actual sampling trajectory with the help of a parametric eddy current model. The actual sample positions were used to reconstruct corrected images and compared with uncorrected data. Results: Comparison of both approaches, i.e., without and with correction of k-space sampling trajectories revealed substantial improvement when correction was applied. The phantom experiments demonstrate substantial in-plane signal intensity variations for uncorrected sampling trajectories. In the case of the volunteer study, this led to significant differences in relative proton density (RPD) estimation between the uncorrected and corrected data (P = 0.0117 by Wilcoxon matched-pairs test) and provides for about 15% higher values for short T2* components of white matter (WM) in the case of uncorrected images. Conclusion: The imperfection of the applied gradients could induce errors in k-space data sampling which further propagates into the fidelity of the UTE images and jeopardizes precision of quantification. However, the study proved that measurement of gradient errors together with correction of sample positions can contribute to increased accuracy and unbiased characterization of short T2* signals.

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

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

Citovat

LATTA, Peter, Z. STARCUK, M.L.H. GRUWEL, Barbora LATTOVA, Petra LATTOVA, Pavel ŠTOURAČ a Boguslaw TOMANEK. Influence of k-space trajectory corrections on proton density mapping with ultrashort echo time imaging: Application for imaging of short T2 components in white matter. MAGNETIC RESONANCE IMAGING. NEW YORK: ELSEVIER SCIENCE INC, 2018, roč. 51, SEP, s. 87-95. ISSN 0730-725X. Dostupné z: https://dx.doi.org/10.1016/j.mri.2018.04.020.

@article{1443118,
   author = {Latta, Peter and Starcuk, Z. and Gruwel, M.L.H. and Lattova, Barbora and Lattova, Petra and Štourač, Pavel and Tomanek, Boguslaw},
   article_location = {NEW YORK},
   article_number = {SEP},
   doi = {http://dx.doi.org/10.1016/j.mri.2018.04.020},
   keywords = {Ultrashort T2; Gradient system imperfections; Ultrashort echo time (UTE); Quantitative MRI},
   language = {eng},
   issn = {0730-725X},
   journal = {MAGNETIC RESONANCE IMAGING},
   title = {Influence of k-space trajectory corrections on proton density mapping with ultrashort echo time imaging: Application for imaging of short T2 components in white matter},
   url = {https://www.sciencedirect.com/science/article/pii/S0730725X18301036?via%3Dihub},
   volume = {51},
   year = {2018}
}

TY  - JOUR
ID  - 1443118
AU  - Latta, Peter - Starcuk, Z. - Gruwel, M.L.H. - Lattova, Barbora - Lattova, Petra - Štourač, Pavel - Tomanek, Boguslaw
PY  - 2018
TI  - Influence of k-space trajectory corrections on proton density mapping with ultrashort echo time imaging: Application for imaging of short T2 components in white matter
JF  - MAGNETIC RESONANCE IMAGING
VL  - 51
IS  - SEP
SP  - 87-95
EP  - 87-95
PB  - ELSEVIER SCIENCE INC
SN  - 0730725X
KW  - Ultrashort T2
KW  - Gradient system imperfections
KW  - Ultrashort echo time (UTE)
KW  - Quantitative MRI
UR  - https://www.sciencedirect.com/science/article/pii/S0730725X18301036?via%3Dihub
N2  - Purpose: To evaluate the impact of MR gradient system imperfections and limitations for the quantitative mapping of short T2* signals performed by ultrashort echo time (UTE) acquisition approach. Materials and methods: The measurement of short T2* signals from a phantom and a healthy volunteer study (8 subjects of average age 28 4 years) were performed on a 3T scanner. The characteristics of the gradient system were obtained using calibration method performed directly on the measured subject or phantom. This information was used to calculate the actual sampling trajectory with the help of a parametric eddy current model. The actual sample positions were used to reconstruct corrected images and compared with uncorrected data. Results: Comparison of both approaches, i.e., without and with correction of k-space sampling trajectories revealed substantial improvement when correction was applied. The phantom experiments demonstrate substantial in-plane signal intensity variations for uncorrected sampling trajectories. In the case of the volunteer study, this led to significant differences in relative proton density (RPD) estimation between the uncorrected and corrected data (P = 0.0117 by Wilcoxon matched-pairs test) and provides for about 15% higher values for short T2* components of white matter (WM) in the case of uncorrected images. Conclusion: The imperfection of the applied gradients could induce errors in k-space data sampling which further propagates into the fidelity of the UTE images and jeopardizes precision of quantification. However, the study proved that measurement of gradient errors together with correction of sample positions can contribute to increased accuracy and unbiased characterization of short T2* signals.
ER  -

LATTA, Peter, Z. STARCUK, M.L.H. GRUWEL, Barbora LATTOVA, Petra LATTOVA, Pavel ŠTOURAČ a Boguslaw TOMANEK. Influence of k-space trajectory corrections on proton density mapping with ultrashort echo time imaging: Application for imaging of short T2 components in white matter. \textit{MAGNETIC RESONANCE IMAGING}. NEW YORK: ELSEVIER SCIENCE INC, 2018, roč.~51, SEP, s.~87-95. ISSN~0730-725X. Dostupné z: https://dx.doi.org/10.1016/j.mri.2018.04.020.

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