NMR spectroscopic analyzing method

Details NMR spectroscopic analyzing method NMR spectroscopic analyzing method

1990-02-16

1993-06-08

Envall, Jr., Roy N.

Boots, shoes, and leggings

G06F 1500

Patent

active

052185311

ABSTRACT:
In an NMR spectroscopic analyzing method to which the simulated annealing method is applied, each amplitude, decay constant, resonant frequency, and phase of each spectrum component of an FID signal formed by a plurality of spectrum components are used as variables. A perturbation of an estimated value of each variable and a decision of whether the perturbation is accepted or rejected are performed in sequence based on a certain probability depending on a variation amount of a cost function produced from the estimated value. The probability of accepting the perturbation is gradually decreased in the process of repeating the perturbations to obtain estimated values which minimize the cost function.

REFERENCES:
patent: 4644473 (1987-02-01), Kojima
patent: 4982159 (1991-01-01), Hoshino
A. Macovski et al., "In Vivo Spectroscopic Magnetic Resonance Imaging Using Estimation Theory," Magnetic Resonance in Medicine, 1986, pp. 97-104.
R. J. Ordidge et al, "Image-Selected in Vivo Spectroscopy (ISIS). A new technique for spatially selective NMR spectroscopy", Journal of Magnetic Resonance, 1987, pp. 283-294.
H. Szu et al, "Fast Simulated Annealing", Physics Letters A, 1987, pp. 157-162.

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