Lactate doublet quantification and lipid signal suppression using a new biexponential decay filter: Application to simulated and 1H MRS brain tumor time-domain data

✍ Scribed by Hacene Serrai; Lotfi Senhadji; Guoyu Wang; Serge Akoka; Patrick Stroman

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 113 KB
• Volume: 50
• Category: Article
• ISSN: 0740-3194
• DOI: 10.1002/mrm.10544

✦ Synopsis

Abstract

A new postprocessing filter based on the continuous wavelet transform (CWT) method modeled as a biexponential decay function to isolate the lactate doublet from overlapping lipid resonance(s) and estimate its magnetic resonance spectroscopy (MRS) parameters (signal amplitude, resonance frequencies, and apparent relaxation time (T)) is proposed. The new filter employs the same iterative process used in the previously single exponential decay filter. A comparison of the results obtained from application of both filters to simulated data and real ^1^H MRS data collected from human blood plasma and brain tumors demonstrates that the new filter provides a better estimate of MRS parameters of lactate, with less computation time. Furthermore, the results show that the new filter is less sensitive to noise and provides a direct estimate of J‐coupling value of the lactate doublet. Magn Reson Med 50:623–626, 2003. © 2003 Wiley‐Liss, Inc.