Reduction of truncation caused artifacts

Details Reduction of truncation caused artifacts Reduction of truncation caused artifacts

1989-05-31

1990-08-21

Williams, Hezron E.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324312, G01R 3320

Patent

active

049509918

ABSTRACT:
The Gibb's artifact in magnetic resonance images is reduced by asymmetrically sampling acquired F.I.D. signals to obtain data, time domain filtering the obtained data with a filter that reduces overshoot, degrades resolution but increases SNR. Then obtaining symmetrical data by complex conjugating the time domain filtered data which improves the resolution, compresses the overshoot, but decreases SNR. Processing the symmetrical data to obtain images with insignificant Gibb's artifacts.

REFERENCES:
patent: 4300096 (1981-11-01), Harrison et al.
patent: 4535460 (1985-08-01), Wedel, Jr.
patent: 4614907 (1986-09-01), Nagayama
patent: 4780675 (1988-10-01), DeMeester et al.
R. Bracewell, "The Fourier Transform and its Application", McGraw-Hill Book Co. (1965), pp. 209-211.

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