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  4. On the suppression of background signals originating from NMR hardware components. Application to zero echo time imaging and relaxation time analysis
 
Zitierlink DOI
10.26092/elib/2469
Verlagslink DOI
10.1016/j.mri.2015.10.008

On the suppression of background signals originating from NMR hardware components. Application to zero echo time imaging and relaxation time analysis

Veröffentlichungsdatum
2016-01-04
Autoren
Dreher, Wolfgang  
Bardenhagen, Ingo  
Huang, Li  
Bäumer, Marcus  
Zusammenfassung
Modern NMR imaging systems used for biomedical research are equipped with B0 gradient systems with strong maximum gradient strength and short switching time enabling (1)H NMR measurements of samples with very short transverse relaxation times. However, background signal originating from non-optimized RF coils may hamper experiments with ultrashort delays between RF excitation and signal reception. We demonstrate that two simple means, outer volume suppression and the use of shaped B0 fields produced by higher-order shim coils, allow a considerable suppression of disturbing background signals. Thus, the quality of NMR images acquired at ultrashort or zero echo time is improved and systematic errors in quantitative data evaluation are avoided. Fields of application comprise MRI with ultrashort echo time or relaxation time analysis, for both biomedical research and characterizing porous media filled with liquids or gases.
Schlagwörter
Zero echo time (ZTE)

; 

Relaxation time analysis

; 

T1 relaxation

; 

Outer volume suppression (OVS)

; 

Higher-order shim coils

; 

Porous media

; 

Mimenima
Verlag
Elsevier
Institution
Universität Bremen  
Fachbereich
Fachbereich 04: Produktionstechnik, Maschinenbau & Verfahrenstechnik (FB 04)  
Dokumenttyp
Artikel/Aufsatz
Zeitschrift/Sammelwerk
Magnetic resonance imaging  
Startseite
264
Endseite
270
Zweitveröffentlichung
Ja
Dokumentversion
Postprint
Lizenz
https://creativecommons.org/licenses/by-nc-nd/4.0/
Sprache
Englisch
Dateien
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Name

W. Dreher, I. Bardenhagen, L. Huang, M. Bäumer_On the suppression of background signals originating from NMR.pdf

Size

649.89 KB

Format

Adobe PDF

Checksum

(MD5):272d2de989759145f2482a5220f4622b

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