Method of enhancing the focus of magnetic resonance images

Details Method of enhancing the focus of magnetic resonance images Method of enhancing the focus of magnetic resonance images

1992-07-28

1994-05-10

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01R 3320

Patent

active

053111320

ABSTRACT:
Disclosed is a method for automatically removing blur in magnetic resonance image signals introduced due to inhomogeneity in the magnetic field and variations in magnetic susceptibility of an object being imaged. Detected signals are demodulated at several different frequencies and reconstructed to create a series of base images. The amount of blur is determined by establishing a focusing measure for each point or part in each base image, and a composite image is then constructed using only the unblurred regions from each base image. Focusing criterion can include minimization of the imaginary part of the complex MRI after removal of constant and low frequency phase information.

REFERENCES:
patent: 5055789 (1991-10-01), Kondo et al.
Noll, et al., "Automatic De-Blurring for Imaging with Time-Varying Gradients," Book of Abstracts, Society of Mag. Res. in Medicine, 10th Annual Scientific Mtg., Aug. 10-16, 1991, San Francisco, CA.
Noll, et al., "Deblurring for Non-2D Fourier Transform Magnetic Resonance Imaging," Magnetic Resonance in Medicine, vol. 25, No. 2, Jun. 1992, pp. 319-333.

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