On the suppression of background signals originating from NMR hardware components. Application to zero echo time imaging and relaxation time analysis
Date Issued
2016-01-04
Abstract
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.
Subjects
Zero echo time (ZTE)
;
Relaxation time analysis
;
T1 relaxation
;
Outer volume suppression (OVS)
;
Higher-order shim coils
;
Porous media
;
Mimenima
Publisher
Elsevier
Institution
Type
journal article
Journal/Edited collection
Start page
264
End page
270
Secondary publication
Yes
Document version
Postprint
Language
English
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Name
W. Dreher, I. Bardenhagen, L. Huang, M. Bäumer_On the suppression of background signals originating from NMR.pdf
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649.89 KB
Format
Adobe PDF
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