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A method of radio-frequency inhomogeneity correction for brain tissue segmentation in MRI

✍ Scribed by L.Q. Zhou; Y.M. Zhu; C. Bergot; A.-M. Laval-Jeantet; V. Bousson; J.-D. Laredo; M. Laval-Jeantet

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
433 KB
Volume
25
Category
Article
ISSN
0895-6111

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✦ Synopsis

An automatic method of correcting radio-frequency (RF) inhomogeneity in magnetic resonance images is presented. The method considers that image intensity variation due to radio-frequency inhomogeneity contains not only low frequency components, but also high frequency components. The variation is regarded as a multiplication of low frequency (capacity variation of coil) and the frequency of object (true image). The ef®ciency of the proposed method is illustrated with the aid of both phantom and physical images. The impact of the inhomogeneity correction on brain tissue segmentation is studied in detail. The results show signi®cant improvement of the tissue segmentation after inhomogeneity correction.

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