Removal of truncation artifacts in NMR imaging

Details Removal of truncation artifacts in NMR imaging Removal of truncation artifacts in NMR imaging

1989-11-21

1991-03-19

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, 36441319, G01R 3356

Patent

active

050014293

ABSTRACT:
Truncation artifacts in NMR images are reduced by splicing to the truncated data extrapolated high frequency data derived from the truncated image. The truncated data is Fourier transformed into image space and processed with an edge enhancing filter. The retransformed, filtered data yields edge derived high frequency information that may augment the truncated data. The spliced truncated data and edge enhanced data are then reconstructed into an artifact reduced image. In one embodiment, the edge enhancement is performed by iterative passes of a modified Sigma filter. The spliced data is blended with the truncated data near the regions of the splice by means of a weighted average.

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patent: 4950991 (1990-08-01), Zur
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A New Algorithm in Spectral Analysis and Band-Limited Extrapolation, Athanasios Papoulis, IEEE Trans on Circuits & Systems, vol. CAS-22, No. 9, Sep. 1975.

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