Optimization of diffusion‐weighted single‐refocused spin‐echo EPI by reducing eddy‐current artifacts and shortening the echo time
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15110%2F18%3A73589937" target="_blank" >RIV/61989592:15110/18:73589937 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/s10334-018-0684-x" target="_blank" >http://dx.doi.org/10.1007/s10334-018-0684-x</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10334-018-0684-x" target="_blank" >10.1007/s10334-018-0684-x</a>
Alternative languages
Result language
angličtina
Original language name
Optimization of diffusion‐weighted single‐refocused spin‐echo EPI by reducing eddy‐current artifacts and shortening the echo time
Original language description
Abstract Objective The purpose of this work was to optimize the acquisition of diffusion-weighted (DW) single-refocused spin-echo (srSE) data without intrinsic eddy-current compensation (ECC) for an improved performance of ECC postprocessing. The rationale is that srSE sequences without ECC may yield shorter echo times (TE) and thus higher signal-to-noise ratios (SNR) than srSE or twice-refocused spin-echo (trSE) schemes with intrinsic ECC. Materials and methods The proposed method employs dummy scans with DW gradients to drive eddy currents into a steady state before data acquisition. Parameters of the ECC postprocessing algorithm were also optimized. Simulations were performed to obtain minimum TE values for the proposed sequence and sequences with intrinsic ECC. Experimentally, the proposed method was compared with standard DW-trSE imaging, both in vitro and in vivo. Results Simulations showed substantially shorter TE for the proposed method than for methods with intrinsic ECC when using shortened echo readouts. Data of the proposed method showed a marked increase in SNR. A dummy scan duration of at least 1.5 s improved performance of the ECC postprocessing algorithm. Conclusion Changes proposed for the DW-srSE sequence and for the parameter setting of the postprocessing ECC algorithm considerably reduced eddy-current artifacts and provided a higher SNR.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
30210 - Clinical neurology
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE
ISSN
0968-5243
e-ISSN
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Volume of the periodical
2018
Issue of the periodical within the volume
31
Country of publishing house
US - UNITED STATES
Number of pages
13
Pages from-to
585-597
UT code for WoS article
000444406200001
EID of the result in the Scopus database
2-s2.0-85044591593