Real-time RF pulse construction for NMR measurement sequences

Details Real-time RF pulse construction for NMR measurement sequences Real-time RF pulse construction for NMR measurement sequences

1996-07-15

1998-10-13

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

G01R 3320

Patent

active

058217525

ABSTRACT:
An RF pulse for an NMR pulse sequence is designed in the NMR system using an inverse SLR transformation method. The polynomials required for the SLR transformation are calculated using a weighted least mean squares ("WLMS") process in which an initial weighting function is employed along with the desired pulse profile that is input by the NMR system operator. The operator can also specify the phase profile as an input to the WLMS process.

REFERENCES:
patent: 4940940 (1990-07-01), LeRoux
Reduced Power Selective Excitation Radio Frequency Pulses, MRM 32:658-660 (1994), Meir Shinnar.
Pulses with Fixed Magnitude and Variable Phase Response Profiles, MRM 33:648-655 (1995), S. Puckup & X. Ding.
A Weighted Least Squares Algorithm for Quasi-Equiripple FIR and IIR Digital Design, IEEE Transaction on Signal Processing, pp. 551-558, vol. 40, No. 3, Mar. 1992, Yong et al.

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