Simple compensation method for improved half-pulse excitation profile with rephasing gradient
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F20%3A00535931" target="_blank" >RIV/68081731:_____/20:00535931 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14740/20:00116481
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/abs/10.1002/mrm.28233" target="_blank" >https://onlinelibrary.wiley.com/doi/abs/10.1002/mrm.28233</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/mrm.28233" target="_blank" >10.1002/mrm.28233</a>
Alternative languages
Result language
angličtina
Original language name
Simple compensation method for improved half-pulse excitation profile with rephasing gradient
Original language description
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.
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
20602 - Medical laboratory technology (including laboratory samples analysis; diagnostic technologies) (Biomaterials to be 2.9 [physical characteristics of living material as related to medical implants, devices, sensors])
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
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 in Medicine
ISSN
0740-3194
e-ISSN
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Volume of the periodical
84
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
1796-1805
UT code for WoS article
000561641400001
EID of the result in the Scopus database
2-s2.0-85080864080