3D localized 2D ultrafast J-resolved magnetic resonance spectroscopy: In vitro study on a 7T imaging system

• Published in: Journal of magnetic resonance (1997) 2012-02, Vol.215, p.50-55
• Main Authors: Roussel, T., Giraudeau, P., Ratiney, H., Akoka, S., Cavassila, S.
• Format: Article
• Language: English
• Subjects: 2D spectroscopy; Bioengineering; Biomedical materials; Imaging; Life Sciences; Magnetic resonance; Position (location); Spatial encoding; Spectroscopy; Surgical implants; Three dimensional; Two dimensional; Ultrafast NMR
• ISSN: 1090-7807; 1096-0856
• DOI: 10.1016/j.jmr.2011.12.013

[Display omitted] ► 3D localized 2D ultrafast J-resolved magnetic resonance spectroscopy sequence. ► Sensitivity, spatial localization and spectral resolution performance assessment for localized ultrafast acquisition. ► Automatic post-processing for ultrafast spectra. 2D Magnetic Resonance Spectroscopy (MRS) is a well known tool for the analysis of complicated and overlapped MR spectra and was therefore originally used for structural analysis. It also presents a potential for biomedical applications as shown by an increasing number of works related to localized in vivo experiments. However, 2D MRS suffers from long acquisition times due to the necessary collection of numerous increments in the indirect dimension (t1). This paper presents the first 3D localized 2D ultrafast J-resolved MRS sequence, developed on a small animal imaging system, allowing the acquisition of a 3D localized 2D J-resolved MRS spectrum in a single scan. Sequence parameters were optimized regarding Signal-to-Noise ratio and spectral resolution. Sensitivity and spatial localization properties were characterized and discussed. An automatic post-processing method allowing the reduction of artifacts inherent to ultrafast excitation is also presented. This sequence offers an efficient signal localization and shows a great potential for in vivo dynamic spectroscopy.