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  Efficient generation of T2*-weighted contrast by interslice echo-shifting for human functional and anatomical imaging at 9.4 Tesla

Ehses, P., Bause, J., Shajan, G., & Scheffler, K. (2015). Efficient generation of T2*-weighted contrast by interslice echo-shifting for human functional and anatomical imaging at 9.4 Tesla. Magnetic Resonance in Medicine, 74(6), 1698-1704. doi:10.1002/mrm.25570.

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Ehses, P1, 2, Autor           
Bause, J1, 2, Autor           
Shajan, G1, 2, Autor           
Scheffler, K1, 2, Autor           
Affiliations:
1Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497796              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Zusammenfassung: Purpose
Standard gradient-echo sequences are often prohibitively slow for inline image-weighted imaging as long echo times prolong the repetition time of the sequence. Echo-shifting offers a way out of this dilemma by allowing an echo time that exceeds the repetition time. The purpose of this work is to present a gradient-echo sequence that is optimized for multislice inline image-weighted imaging applications by combining echo-shifting with an interleaved slice excitation order.
Theory and Methods
This combined approach offers two major advantages: First, it combines the advantages of both concepts, that is, echo time and pulse repetition time can be significantly increased without affecting scan time. Second, there is no echo-shifting related signal loss associated with this concept as only a single radiofrequency pulse is applied per pulse repetition time and slice.
Results
A 9.4 Tesla high-resolution inline image-weighted anatomical brain scan of the proposed sequence is compared to a standard gradient-echo. Furthermore, results from 9.4 Tesla blood oxygen level dependent functional magnetic resonance imaging experiments with an in-plane resolution of 0.8 × 0.8 mm2 are presented.
Conclusion
The proposed sequence allows for efficient generation of inline image-weighted contrast by combining echo-shifting with an interleaved slice excitation order.

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 Datum: 2015-12
 Publikationsstatus: Erschienen
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 Identifikatoren: DOI: 10.1002/mrm.25570
BibTex Citekey: EhsesBSS2014
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Titel: Magnetic Resonance in Medicine
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: New York : Wiley-Liss
Seiten: - Band / Heft: 74 (6) Artikelnummer: - Start- / Endseite: 1698 - 1704 Identifikator: ISSN: 0740-3194
CoNE: https://pure.mpg.de/cone/journals/resource/954925538149