Water-inversion based difference techniques for localized proton spectroscopy without water suppression

0205459 - UPT-D 20020009 RIV GB eng C - Conference Paper (international conference)
Starčuk jr., Zenon - Starčuk, Zenon - Mlynárik, V. - Horký, Jaroslav - Moser, E.
Water-inversion based difference techniques for localized proton spectroscopy without water suppression.
Proceedings of the international society for magnetic resonance in medicine. Honolulu: ISMRM, 2002, s. 2511. ISSN 1524-6965.
[Scientific meeting and exhibition. Honolulu (US), 18.05.2002-24.05.2002]
R&D Projects: GA AV ČR IAA4065901
Grant - others:AIP(XC) KONTAKT 2000/9
Institutional research plan: CEZ:AV0Z2065902
Keywords : gradients * short-TE in vivo MR spectra * water suppressing
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering

This communication compares several approaches to the measurement of short-TE in vivo MR spectra without suppressing water, whose signal is desirable as an internal reference for quantitation or for various corrections. Unfortunately, modulation artifacts, attributed to B ₀ oscillation due to gradients, may severely corrupt the spectra on some scanners. Furthermore, sufficient accuracy of water line fitting, necessary for quantitation, gas been found very hard to achieve. Two approaches capable of delivering good spectra are demonstrated. Both employ summing the signals acquired with and without prelocalization water inversion, and eliminate the modulation by FID-modulus FT or by reference-based phase correction.
Permanent Link: http://hdl.handle.net/11104/0101072