A New Time-Domain Frequency-Selective Quantification Algorithm
Source: Journal of Magnetic Resonance, Volume 155, Number 2, April 2002 , pp. 226-235(10)
Publisher: Academic Press
Abstract:In this paper a new time-domain frequency-selective quantification algorithm is presented. Frequency-selective quantification refers to a method that analyzes spectral components in a selected frequency region, ignoring all the other components outside. The algorithm, referred to as MeFreS (Metropolis Frequency-Selective), is based on rank minimization of an opportune Hankel matrix. The minimization procedure is satisfied by the down-hill simplex method, implemented with the simulated annealing method. MeFreS does not use any preprocessing step or filter to suppress nuisance peaks, but the signal model function is directly fitted. In this manner, neither inherent signal distortions nor estimation biases to be corrected occur. The algorithm was tested with Monte Carlo simulations. A comparison with VARPRO and AMARESw algorithms was carried out. Finally, two samples of known content from NMR data were quantified. © 2002 Elsevier Science (USA).
Document Type: Research Article
Affiliations: 1: Istituto Nazionale per la Fisica della Materia, Unità di Napoli, c/o Dipartimento di Scienze Fisiche, Università degli Studi di Napoli Federico II, Complesso Universitario di Monte S. Angelo, via Cinthia, Naples, I-80126, Italy 2: Dipartimento di Scienze Fisiche, Università degli Studi di Napoli Federico II, Complesso Universitario di Monte S. Angelo, via Cinthia, Naples, 80126, Italy
Publication date: April 1, 2002