3 August 1984 Correction Method Of Image Distortion Due To Non-Uniformity Of Static Magnetic Field In Nmr Imaging
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Abstract
In the image formation methods, using nuclear magnetic resonance (NMR) techniques, static magnetic field with spatial uniformity is used. The spatial fluctuation of the static field causes distortion of the images. We propose a method for correcting the image distortion in a case that the direct Fourier transform image formation method is applied. The correction procedure is as follows. (1) The distorted image of a standard phantom, which is composed of many point objects, is reconstructed. (2) The displacements of these point objects in the image are calculated. (3) The non-uniform static magnetic field is estimated from those values. (4) The image distortion of a desired object is corrected using the estimated value. The feasiblity of the proposed method is confirmed by experimental results.
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Akira Kawanaka, Mikio Takagi, "Correction Method Of Image Distortion Due To Non-Uniformity Of Static Magnetic Field In Nmr Imaging", Proc. SPIE 0515, Medical Images and Icons, (3 August 1984); doi: 10.1117/12.964750; https://doi.org/10.1117/12.964750
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