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Optimized spectrally selective steady-state free precession sequences for cartilage imaging at ultra-high fields

Bieri, O. and Mamisch, T. C. and Trattnig, S. and Kraff, O. and Ladd, M. E. and Scheffler, K.. (2008) Optimized spectrally selective steady-state free precession sequences for cartilage imaging at ultra-high fields. Magnetic resonance materials in physics, biology, and medicine, Vol. 21, H. 1-2. pp. 87-94.

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Official URL: http://edoc.unibas.ch/dok/A6005222

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Abstract

OBJECT: Fat suppressed 3D steady-state free precession (SSFP) sequences are of special interest in cartilage imaging due to their short repetition time in combination with high signal-to-noise ratio. At low-to-high fields (1.5-3.0 T), spectral spatial (spsp) radio frequency (RF) pulses perform superiorly over conventional saturation of the fat signal (FATSAT pulses). However, ultra-high fields (7.0 T and more) may offer alternative fat suppression techniques as a result of the increased chemical shift. MATERIALS AND METHODS: Application of a single, frequency selective, RF pulse is compared to spsp excitation for water (or fat) selective imaging at 7.0 T. RESULTS: For SSFP, application of a single frequency selective RF pulse for selective water or fat excitation performs beneficially over the commonly applied spsp RF pulses. In addition to the overall improved fat suppression, the application of single RF pulses leads to decreased power depositions, still representing one of the major restrictions in the design and application of many pulse sequences at ultra-high fields. CONCLUSION: The ease of applicability and implementation of single frequency selective RF pulses at ultra-high-fields might be of great benefit for a vast number of applications where fat suppression is desirable or fat-water separation is needed for quantification purposes.
Faculties and Departments:03 Faculty of Medicine > Bereich Querschnittsfächer (Klinik) > Ehemalige Einheiten Querschnittsfächer (Klinik) > Radiologische Physik (Scheffler)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Querschnittsfächer (Klinik) > Ehemalige Einheiten Querschnittsfächer (Klinik) > Radiologische Physik (Scheffler)
UniBasel Contributors:Scheffler, Klaus
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Springer
ISSN:1352-8661
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:31 Jan 2014 09:49
Deposited On:31 Jan 2014 09:49

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