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

Bieri, O; Mamisch, TC; Trattnig, S; Kraff, O; Ladd, ME; 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 MAGMA, 21(1-2), pp. 87-94. New York, N.Y.: Chapman & Hall 10.1007/s10334-007-0092-0

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery

UniBE Contributor:

Mamisch, Tallal Charles

ISSN:

0968-5243

ISBN:

18030512

Publisher:

Chapman & Hall

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 15:03

Last Modified:

17 Mar 2015 22:16

Publisher DOI:

10.1007/s10334-007-0092-0

PubMed ID:

18030512

Web of Science ID:

000254751300009

URI:

https://boris.unibe.ch/id/eprint/27474 (FactScience: 107832)

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