Reduction of B0 inhomogeneity effects in triple-quantum-filtered sodium imaging

• Verfasst von: Matthies, Christian [VerfasserIn]
• Verfasst von: Nagel, Armin Michael [VerfasserIn]
• Verfasst von: Schad, Lothar R. [VerfasserIn]
• Verfasst von: Bachert, Peter [VerfasserIn]
• Titel: Reduction of B0 inhomogeneity effects in triple-quantum-filtered sodium imaging
• Verf.angabe: Christian Matthies, Armin M. Nagel, Lothar R. Schad, Peter Bachert
• Jahr: 2010
• Umfang: 6 S.
• Fussnoten: Im Titel erscheint die Ziffer 0 tiefgestellt ; Online veröffentlicht am 18. November 2009 ; Gesehen am 25.05.2023
• Titel Quelle: Enthalten in: Journal of magnetic resonance
• Ort Quelle: Amsterdam [u.a.] : Elsevier, 1969
• Jahr Quelle: 2010
• Band/Heft Quelle: 202(2010), 2, Seite 239-244
• ISSN Quelle: 1096-0856
• DOI: doi:10.1016/j.jmr.2009.11.004
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Coherence
• Sach-SW: inhomogeneity
• Sach-SW: Multiple-quantum filter
• Sach-SW: Sodium MRI
• K10plus-PPN: 1846204135

Abstract

Triple-quantum (TQ) filtered sodium MR imaging has been proposed for separation of sodium signal arising from different physiological compartments. In a three-pulse sequence without refocussing pulse, the TQ signal is strongly sensitive to inhomogeneities of the B0 field. We examine the dependence of the TQ signal intensity on the sequence parameters and propose a modified phase-cycling scheme to improve image quality. A new method for correction of B0 inhomogeneity artefacts in TQ filtered sodium imaging is presented which requires only two acquisitions to obtain a correction as far as the B0 inhomogeneity and the pulse widths are not too large. The method was verified in phantom experiments.